Patent Publication Number: US-11026031-B2

Title: Magnet positioning in an external device

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a Continuation application of U.S. patent application Ser. No. 16/129,740, filed Sep. 12, 2018, which is a Continuation application of U.S. patent application Ser. No. 15/166,628, filed May 27, 2016, the contents of all of these applications being incorporated herein by reference in their entirety. 
    
    
     BACKGROUND 
     Hearing loss, which may be due to many different causes, is generally of two types: conductive and sensorineural. Sensorineural hearing loss is due to the absence or destruction of the hair cells in the cochlea that transduce sound signals into nerve impulses. Various hearing prostheses are commercially available to provide individuals suffering from sensorineural hearing loss with the ability to perceive sound. For example, cochlear implants use an electrode array implanted in the cochlea of a recipient to bypass the mechanisms of the ear. More specifically, an electrical stimulus is provided via the electrode array to the auditory nerve, thereby causing a hearing percept. 
     Conductive hearing loss occurs when the normal mechanical pathways that provide sound to hair cells in the cochlea are impeded, for example, by damage to the ossicular chain or the ear canal. Individuals suffering from conductive hearing loss may retain some form of residual hearing because the hair cells in the cochlea may remain undamaged. 
     Individuals suffering from conductive hearing loss typically receive an acoustic hearing aid. Hearing aids rely on principles of air conduction to transmit acoustic signals to the cochlea. In particular, a hearing aid typically uses an arrangement positioned in the recipient&#39;s ear canal or on the outer ear to amplify a sound received by the outer ear of the recipient. This amplified sound reaches the cochlea causing motion of the perilymph and stimulation of the auditory nerve. 
     In contrast to hearing aids, which rely primarily on the principles of air conduction, certain types of hearing prostheses commonly referred to as bone conduction devices, convert a received sound into vibrations. The vibrations are transferred through the skull to the cochlea causing generation of nerve impulses, which result in the perception of the received sound. Bone conduction devices are suitable to treat a variety of types of hearing loss and may be suitable for individuals who cannot derive sufficient benefit from acoustic hearing aids, cochlear implants, etc., or for individuals who suffer from stuttering problems. Conversely, cochlear implants can have utilitarian value with respect to recipients where all of the inner hair inside the cochlea has been damaged or otherwise destroyed. Electrical impulses are provided to electrodes located inside the cochlea, which stimulate nerves of the recipient so as to evoke a hearing percept. 
     SUMMARY 
     In accordance with one aspect, there is a button sound processor, comprising an RF coil, sound processing apparatus, and a magnet, wherein the button sound processor has a skin interface side configured to interface with skin of a recipient, and the button sound processor is configured such that the magnet is installable into the button sound processor from the skin interface side. 
     In accordance with another aspect, there is a body piece configured for transcutaneous communication with a component implanted in a recipient, comprising an RF coil, and a magnet apparatus, wherein the RF coil is located on a first side of the body piece relative to an opposite side of the body piece, the body piece is configured such that the magnet apparatus is installable into the body piece from the first side, and the body piece is configured such that the magnet apparatus is rotationally lockable in place to the body piece. 
     In accordance with another aspect, there is a body piece configured for transcutaneous communication with an implanted component implanted in a recipient, comprising: a first housing, a magnet, a second housing, wherein the second housing completely envelops the magnet, the second housing forms an outer surface of the body piece, and at least one of the first housing completely covers the second housing with respect views of the body piece over 360 degrees of azimuthal angle and at least 170 continuous degrees of polar angle about of the first housing or the body piece is configured such that the second housing installable into the first housing at a skin interface side of the body piece. 
     In accordance with another aspect, there is a method, comprising obtaining a first portion of a headpiece for a prosthesis, the first portion including electronic components of the prosthesis, obtaining a second portion of the headpiece, the second portion including a first magnet, attaching the second portion to the first portion by inserting the second portion into a receptacle of the first portion from a side of the headpiece configured to interface with skin of the recipient. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Some embodiments are described below with reference to the attached drawings, in which: 
         FIG. 1  is a perspective view of an exemplary bone conduction device in which at least some embodiments can be implemented; 
         FIG. 2  is a schematic diagram conceptually illustrating a passive transcutaneous bone conduction device; 
         FIG. 3  is a schematic diagram conceptually illustrating an active transcutaneous bone conduction device in accordance with at least some exemplary embodiments; 
         FIG. 4  is a schematic diagram of a cross-section of an exemplary external component according to an exemplary embodiment; 
         FIG. 5  is a schematic diagram of a cross-section of an exemplary external component according to the exemplary embodiment of  FIG. 4 , except with the components spaced apart from one another for purposes of clarity; 
         FIG. 6  is a schematic diagram of a cross-section of a portion of the embodiment of  FIG. 4 ; 
         FIG. 7  is a schematic diagram of a cross-section of another portion of the embodiment of  FIG. 4 ; 
         FIG. 8  is a schematic diagram of an exemplary placement of an external component according to an exemplary embodiment relative to the head of a human; 
         FIG. 9  is a schematic diagram depicting the placement of the external component placed according to  FIG. 8 , except with respect to another frame of reference; 
         FIG. 10  is a schematic diagram depicting another exemplary embodiment of an external component; 
         FIG. 11  is a schematic diagram of a cross-section of another exemplary external component according to an exemplary embodiment; 
         FIG. 12  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIG. 13  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIG. 14A  is an isometric view of an exemplary magnet apparatus according to an exemplary embodiment; 
         FIG. 14B  is another isometric view of an exemplary magnet apparatus according to an exemplary embodiment; 
         FIG. 14C  is a cross-sectional view of an exemplary magnet apparatus according to an exemplary embodiment; 
         FIG. 15  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIG. 16  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIGS. 17, 18 and 19  present exemplary frame of reference is for some exemplary embodiments; 
         FIGS. 20 and 21 and 22  present some exemplary conceptual schematics according to an exemplary embodiment; 
         FIG. 23  presents an exemplary flowchart for an exemplary method according to an exemplary embodiment; 
         FIG. 24  presents an exemplary flowchart for an exemplary method according to an exemplary embodiment; 
         FIG. 25  is a graph presenting some exemplary data according to some exemplary embodiments; 
         FIG. 26  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIG. 27  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIG. 28  is a schematic diagram of a cross-section of a portion of an exemplary external component according to an exemplary embodiment; 
         FIG. 29  is an isometric view of exemplary housing subcomponents according to an exemplary embodiment; 
         FIG. 30  is a cross-sectional view of another exemplary embodiment of a component of an external component according to an exemplary embodiment; and 
         FIG. 31  is an isometric view of exemplary housing subcomponents according to another exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Embodiments herein are described primarily in terms of a bone conduction device, such as an active transcutaneous bone conduction device. However, it is noted that the teachings detailed herein and/or variations thereof are also applicable to a cochlear implant and/or a middle ear implant. Accordingly, any disclosure herein of teachings utilized with an active transcutaneous bone conduction device also corresponds to a disclosure of utilizing those teachings with respect to a cochlear implant and utilizing those teachings with respect to a middle ear implant. Moreover, at least some exemplary embodiments of the teachings detailed herein are also applicable to a passive transcutaneous bone conduction device. It is further noted that the teachings detailed herein can be applicable to other types of prostheses, such as by way of example only and not by way of limitation, a retinal implant. Indeed, the teachings detailed herein can be applicable to any component that is held against the body that utilizes an RF coil and/or an inductance coil or any type of communicative coil to communicate with a component implanted in the body. That said, the teachings detailed herein will be directed by way of example only and not by way of limitation towards a component that is held against the head of a recipient for purposes of the establishment of an external component of the hearing prosthesis. In view of this,  FIG. 1  is a perspective view of a bone conduction device  100  in which embodiments may be implemented. As shown, the recipient has an outer ear  101 , a middle ear  102  and an inner ear  103 . Elements of outer ear  101 , middle ear  102  and inner ear  103  are described below, followed by a description of bone conduction device  100 . 
     In a fully functional human hearing anatomy, outer ear  101  comprises an auricle  105  and an ear canal  106 . A sound wave or acoustic pressure  107  is collected by auricle  105  and channeled into and through ear canal  106 . Disposed across the distal end of ear canal  106  is a tympanic membrane  104  which vibrates in response to acoustic wave  107 . This vibration is coupled to oval window or fenestra ovalis  210  through three bones of middle ear  102 , collectively referred to as the ossicles  111  and comprising the malleus  112 , the incus  113  and the stapes  114 . The ossicles  111  of middle ear  102  serve to filter and amplify acoustic wave  107 , causing oval window  210  to vibrate. Such vibration sets up waves of fluid motion within cochlea  139 . Such fluid motion, in turn, activates hair cells (not shown) that line the inside of cochlea  139 . Activation of the hair cells causes appropriate nerve impulses to be transferred through the spiral ganglion cells and auditory nerve  116  to the brain (not shown), where they are perceived as sound. 
       FIG. 1  also illustrates the positioning of bone conduction device  100  relative to outer ear  101 , middle ear  102  and inner ear  103  of a recipient of device  100 . Bone conduction device  100  comprises an external component  140  and implantable component  150 . As shown, bone conduction device  100  is positioned behind outer ear  101  of the recipient and comprises a sound input element  126  to receive sound signals. Sound input element  126  may comprise, for example, a microphone. In an exemplary embodiment, sound input element  126  may be located, for example, on or in bone conduction device  100 , or on a cable extending from bone conduction device  100 . 
     More particularly, sound input device  126  (e.g., a microphone) converts received sound signals into electrical signals. These electrical signals are processed by the sound processor. The sound processor generates control signals which cause the actuator to vibrate. In other words, the actuator converts the electrical signals into mechanical motion to impart vibrations to the recipient&#39;s skull. 
     Alternatively, sound input element  126  may be subcutaneously implanted in the recipient, or positioned in the recipient&#39;s ear. Sound input element  126  may also be a component that receives an electronic signal indicative of sound, such as, for example, from an external audio device. For example, sound input element  126  may receive a sound signal in the form of an electrical signal from an MP 3  player electronically connected to sound input element  126 . 
     Bone conduction device  100  comprises a sound processor (not shown), an actuator (also not shown), and/or various other operational components. In operation, the sound processor converts received sounds into electrical signals. These electrical signals are utilized by the sound processor to generate control signals that cause the actuator to vibrate. In other words, the actuator converts the electrical signals into mechanical vibrations for delivery to the recipient&#39;s skull. 
     In accordance with some embodiments, a fixation system  162  may be used to secure implantable component  150  to skull  136 . As described below, fixation system  162  may be a bone screw fixed to skull  136 , and also attached to implantable component  150 . 
     In one arrangement of  FIG. 1 , bone conduction device  100  can be a passive transcutaneous bone conduction device. That is, no active components, such as the actuator, are implanted beneath the recipient&#39;s skin  132 . In such an arrangement, the active actuator is located in external component  140 , and implantable component  150  includes a magnetic plate, as will be discussed in greater detail below. The magnetic plate of the implantable component  150  vibrates in response to vibration transmitted through the skin, mechanically and/or via a magnetic field, that is generated by an external magnetic plate. 
     In another arrangement of  FIG. 1 , bone conduction device  100  can be an active transcutaneous bone conduction device where at least one active component, such as the actuator, is implanted beneath the recipient&#39;s skin  132  and is thus part of the implantable component  150 . As described below, in such an arrangement, external component  140  may comprise a sound processor and transmitter, while implantable component  150  may comprise a signal receiver and/or various other electronic circuits/devices. 
       FIG. 2  depicts an exemplary transcutaneous bone conduction device  300  that includes an external device  340  (corresponding to, for example, element  140  of  FIG. 1 ) and an implantable component  350  (corresponding to, for example, element  150  of  FIG. 1 ). The transcutaneous bone conduction device  300  of  FIG. 3  is a passive transcutaneous bone conduction device in that a vibrating electromagnetic actuator  342  is located in the external device  340 . Vibrating electromagnetic actuator  342  is located in housing  344  of the external component, and is coupled to plate  346 . Plate  346  may be in the form of a permanent magnet and/or in another form that generates and/or is reactive to a magnetic field, or otherwise permits the establishment of magnetic attraction between the external device  340  and the implantable component  350  sufficient to hold the external device  340  against the skin of the recipient. 
     In an exemplary embodiment, the vibrating electromagnetic actuator  342  is a device that converts electrical signals into vibration. In operation, sound input element  126  converts sound into electrical signals. Specifically, the transcutaneous bone conduction device  300  provides these electrical signals to vibrating electromagnetic actuator  342 , or to a sound processor (not shown) that processes the electrical signals, and then provides those processed signals to vibrating electromagnetic actuator  342 . The vibrating electromagnetic actuator  342  converts the electrical signals (processed or unprocessed) into vibrations. Because vibrating electromagnetic actuator  342  is mechanically coupled to plate  346 , the vibrations are transferred from the vibrating electromagnetic actuator  342  to plate  346 . Implanted plate assembly  352  is part of the implantable component  350 , and is made of a ferromagnetic material that may be in the form of a permanent magnet, that generates and/or is reactive to a magnetic field, or otherwise permits the establishment of a magnetic attraction between the external device  340  and the implantable component  350  sufficient to hold the external device  340  against the skin of the recipient. Accordingly, vibrations produced by the vibrating electromagnetic actuator  342  of the external device  340  are transferred from plate  346  across the skin to plate  355  of plate assembly  352 . This can be accomplished as a result of mechanical conduction of the vibrations through the skin, resulting from the external device  340  being in direct contact with the skin and/or from the magnetic field between the two plates. These vibrations are transferred without penetrating the skin with a solid object, such as an abutment, with respect to a percutaneous bone conduction device. 
     As may be seen, the implanted plate assembly  352  is substantially rigidly attached to a bone fixture  341  in this embodiment. Plate screw  356  is used to secure plate assembly  352  to bone fixture  341 . The portions of plate screw  356  that interface with the bone fixture  341  substantially correspond to an abutment screw discussed in some additional detail below, thus permitting plate screw  356  to readily fit into an existing bone fixture used in a percutaneous bone conduction device. In an exemplary embodiment, plate screw  356  is configured so that the same tools and procedures that are used to install and/or remove an abutment screw (described below) from bone fixture  341  can be used to install and/or remove plate screw  356  from the bone fixture  341  (and thus the plate assembly  352 ). 
       FIG. 3  depicts an exemplary embodiment of a transcutaneous bone conduction device  400  according to another embodiment that includes an external device  440  (corresponding to, for example, element  140 B of  FIG. 1 ) and an implantable component  450  (corresponding to, for example, element  150  of  FIG. 1 ). The transcutaneous bone conduction device  400  of  FIG. 3  is an active transcutaneous bone conduction device in that the vibrating electromagnetic actuator  452  is located in the implantable component  450 . Specifically, a vibratory element in the form of vibrating electromagnetic actuator  452  is located in housing  454  of the implantable component  450 . In an exemplary embodiment, much like the vibrating electromagnetic actuator  342  described above with respect to transcutaneous bone conduction device  300 , the vibrating electromagnetic actuator  452  is a device that converts electrical signals into vibration. 
     External component  440  includes a sound input element  126  that converts sound into electrical signals. Specifically, the transcutaneous bone conduction device  400  provides these electrical signals to vibrating electromagnetic actuator  452 , or to a sound processor (not shown) that processes the electrical signals, and then provides those processed signals to the implantable component  450  through the skin of the recipient via a magnetic inductance link. In this regard, a transmitter coil  442  of the external component  440  transmits these signals to implanted receiver coil  456  located in housing  458  of the implantable component  450 . Components (not shown) in the housing  458 , such as, for example, a signal generator or an implanted sound processor, then generate electrical signals to be delivered to vibrating electromagnetic actuator  452  via electrical lead assembly  460 . The vibrating electromagnetic actuator  452  converts the electrical signals into vibrations. 
     The vibrating electromagnetic actuator  452  is mechanically coupled to the housing  454 . Housing  454  and vibrating electromagnetic actuator  452  collectively form a vibratory apparatus  453 . The housing  454  is substantially rigidly attached to bone fixture  341 . 
       FIG. 4  depicts a cross-sectional view of an exemplary external component  540  corresponding to a device that can be used as external component  440  in the embodiment of  FIG. 3 . In an exemplary embodiment, external component  540  has all of the functionalities detailed above with respect to external component  440 . 
     External component  540  comprises a first sub component  550  and a second sub component  560 . It is briefly noted that back lines have been eliminated in some cases for purposes of ease of illustration (e.g., such as the line between sub component  550  and sub component  560 —note that  FIGS. 5 and 6 and 7  respectively depict these sub components in isolation relative to the other component). It is further noted that unless otherwise stated, the components of  FIG. 4  are rotationally symmetric about axis  599 , although in other embodiments, such is not necessarily the case. 
     In an exemplary embodiment, external component  540  is a so called button sound processor as detailed above. In this regard, in the exemplary embodiment of  FIG. 4 , the external component  540  includes a sound capture apparatus  526 , which can correspond to the sound capture apparatuses  126  detailed above, and also includes a sound processor apparatus  556  which is in signal communication with or located on or otherwise integrated into a printed circuit board  554 . Further as can be seen in  FIG. 4 , an electromagnetic radiation interference shield  554  is interposed between the coil  542  and the PCB  554  and/or the sound processor  556 . In an exemplary embodiment, the shield  552  is a ferrite shield. These components are housed in or otherwise supported by subcomponent  550 . Subcomponent  550  further houses or otherwise supports RF coil  542 . Coil  542  can correspond to the coil  442  detailed above. In an exemplary embodiment, sound captured by the sound capture apparatus  526  is provided to the sound processor  556 , which converts the sound into a processed signal which is provided to the RF coil  542 . In an exemplary embodiment, the RF coil  542  is an inductance coil. The inductance coil is energized by the signal provided from the processor  556 . The energized coil produces an electro-magnetic field that is received by an implanted coil in the implantable component  450 , which is utilized by the implanted component  450  as a basis to evoke a hearing percept as detailed above. 
     The external component  540  further includes a magnet  564  which is housed in subcomponent  560 . Subcomponent  560  is removably replaceable to/from subcomponent  550 . In the exemplary embodiment of  FIG. 4  when utilized in conjunction with the embodiment of  FIG. 3 , the magnet  564  forms a transcutaneous magnetic link with a ferromagnetic material implanted in the recipient (such as a magnet that is part of the implantable component  450 , etc.). This transcutaneous magnetic link holds the external component  540  against the skin of the recipient. In this regard, the external component  550  includes a skin interface side  544 , which skin interface side is configured to interface with skin of a recipient, and an opposite side  546  that is opposite the skin interface side  544 . That is, when the external component  540  is held against the skin of the recipient via the magnetic link, such as when the external component  540  is held against the skin overlying the mastoid bone where the implantable component is located in or otherwise attached to the mastoid bone, side  546  is what a viewer who is looking at the recipient wearing the external component  540  can see (i.e., in a scenario where the external component  540  is held against the skin over the mastoid bone, and a viewer is looking at the side of the recipient&#39;s head, side  546  would be what the viewer sees of the external component  540 ). 
     Still with reference to  FIG. 4 , skin interface side  544  includes skin interface surfaces  592  and  594 . Skin interface surface  592  corresponds to the bottom most surface of the sub component  560 , and skin interface surface  594  corresponds to the bottom most surface of the subcomponent  550 . Collectively, these surfaces establish surface assembly  596 . Surface assembly  596  corresponds to the skin interface surfaces of the external component  540 . It is briefly noted that in some exemplary embodiments, the arrangement of the external component  540  is such that the subcomponent  560  can be placed into the subcomponent  550  such that the bottom surface  592  is recessed relative to the bottom surface  594 , and thus the surface  592  may not necessarily contract or otherwise interface with the recipient. It is further briefly noted that in some alternate exemplary embodiments, the arrangement of the external component  540  is reversed, where surface  594  does not contact the recipient because surface  592  remains proud of surface  594  after insertion of the subcomponent  560  into the subcomponent  550 . 
     It is briefly noted that as used herein, the subcomponent  550  is utilized to shorthand for the external component  540 . That is, external component  540  exists irrespective of whether the subcomponent  560  is located in the subcomponent  550  or otherwise attached to subcomponent  550 . 
     In the embodiment of  FIG. 4 , the external component  550  is configured such that the subcomponent  560 , and thus the magnet  564  and the housing containing magnet  564  (housing  562 ), is installable into the external component  540  (i.e., from subcomponent  550 ) from the skin interface side  544 , and thus is installable into the housing  548  at the skin interface side. Also, in some embodiments, the subcomponent  560  is removable from the external component  550 . This is represented functionally by arrows  597  and  598 , where arrow  597  represents movements of the subcomponent(s) towards each other, thus corresponding to installation of the subcomponent  560 , and thus the magnet  564 , into the external component  540  and removal of the subcomponent  560  from the external component  540 , and where arrow  598  represents a turning action of the subcomponent(s) relative to one another so as to “lock” subcomponent  562  subcomponent  550  as will be described in greater detail below, thus making the subcomponents rotationally lockable to one another. However, it is briefly noted that the turn locking as detailed herein does not correspond to mere thread engagement, such as by way of example how a bolt is threaded onto a nut, or visa-versa, because such does not result in locking of the components together. Some additional details of the arrangements utilized to obtain the aforementioned rotational locking are described in greater detail below. However, it is briefly noted that in some alternate embodiments, the subcomponents are snapped coupled or otherwise snapped locked to one another without rotation. By way of example only and not by way of limitation, the housing subcomponent containing the magnet can have detent receptacle located on a side surface, where a male detent of the housing containing the RF coil or the like interfaces with the receptacle so as to lock the subcomponents together. Any arrangement that can enable the retention of the subcomponents one another can utilize in at least some exemplary embodiments. 
     Still with reference to  FIG. 4 , it can be seen that the external component  540  includes a battery  580 . In an exemplary embodiment, the battery  580  powers the sound processor  556  and/or the RF coil  542 . As can be seen in  FIG. 4 , the battery  580  is positioned between the subcomponent  560 , and thus the magnet  564 , and the side  546  of the external component  540  opposite the side  544  configured to interface with the skin. 
     The subcomponent  550  comprises a housing  548  that contains the RF coil  542 , the sound processor apparatus  556 , and the battery  580 .  FIG. 6  depicts a cross-section of housing  548  without any other components therein. As can be seen, housing  548  includes hole  566  through which the sound capture apparatus  526  (not shown) extends. As can be understood from the figures, the housing  548  of the subcomponent  550  is such that subcomponent  560 , and thus magnet  564 , is completely external to the housing  548  of the subcomponent  550 . (It is noted that in some embodiments, hole  556  is not present, and a microphone or other sound capture apparatus is located outside the housing  548  and is in wireless signal communication with the sound processor therein.) 
     In the embodiment depicted in  FIG. 6 , housing  548  includes housing subcomponent  547  and housing subcomponent  549 . These two components are joined together at seam  505 . It is briefly noted that while the embodiment presented in  FIG. 6  presents to subcomponents of the housing  548 , in an alternate embodiment, additional components are utilized to establish the housing, as will be described in greater detail below. In an exemplary embodiment, the subcomponent  547  and the subcomponent  549  are completely made out of a plastic material or other polymer material. That said, in an alternate embodiment, at least a portion of the subcomponents can be made out of a metal, such as by way of example, titanium. In an exemplary embodiment, the housing  548  is such that the housing, when assembled, provides sufficient structural integrity so as to protect the internal components from impact by another component (e.g., a soccer ball, the back of someone&#39;s hand, etc.). Some additional details of the functional features of the housing  548  will be described below. 
     Still further,  FIG. 7  depicts a cross-section of an exemplary subcomponent  560  that contains the magnet  564  (not shown). Subcomponent  560  also includes a housing  562 . In this embodiment, housing  562  can be formed or otherwise casted about the magnet  564 . Thus, in an exemplary embodiment, housing  562  can be a one piece housing/monolithic housing. That said, in an alternate embodiment, housing  562  can comprise two or more subcomponents that when joined together, form housing  562  so as to encapsulate or otherwise contain magnet  564 . 
     Briefly,  FIG. 8  depicts an exemplary placement of the external component  540  against the head of a recipient from the frame of reference of the viewer looking at a right side of a recipient, where the recipient is looking ahead (the “right side” being the recipient&#39;s right side—the side of the recipient&#39;s right hand. Shown in  FIG. 8  for purposes of reference is the pinna of the recipient, and the ear canal of the recipient  106 . Horizontal axis  94  and vertical axis  99  are centered at the center of the outer opening of the ear canal  106 . Horizontal axis  94  corresponds to the gravitational horizon, and vertical axis  99  is parallel to the direction of gravity. 
     As can be seen, surface  598  of the external component  540  is visible by the viewer. Conversely, the subcomponent  560  housing the magnet  564 , corresponding to a magnet housing apparatus in an exemplary embodiment, is only visible from the skin interface side  544 . The magnet housing apparatus is not visible from the opposite side  546  from the skin interface side  544  (the side visible in  FIG. 8 ). 
     Corollary to the above,  FIG. 9  depicts the exemplary placement of  FIG. 8  except when looking from the inside of the recipient (i.e., at the location of the brain) out. As can be seen, the subcomponent  560  (the magnet housing apparatus) is now visible, along with surface assembly  596 . (This illustration is presented under the fictitious scenario where the skin supporting the external component  540  is transparent.) Thus, it can be understood that at least some exemplary embodiments detailed herein are such that the subcomponent  560  is only visible from the skin interface side  544  of the external component  540 . 
       FIG. 10  depicts an alternate embodiment of an external component of a bone conduction device, BTE device  1040 , which can be used in place of external component  440  detailed above, and otherwise has the functionality thereof in at least some exemplary embodiments. More specifically,  FIG. 10  depicts a perspective view of a BTE device of a hearing prosthesis. BTE device  1040  includes one or more microphones  1026 , and may further include an audio signal under a cover  220  on the spine  330  of BTE device  1040 . It is noted that in some other embodiments, one or both of these components (microphone  1026  and/or the jack) may be located on other positions of the BTE device  1040 , such as, for example, the side of the spine  330  (as opposed to the back of the spine  330 , as depicted in  FIG. 10 ), the ear hook  290 , etc.  FIG. 10  further depicts battery  252  and ear hook  290  removably attached to spine  330 . 
     In an exemplary embodiment, the external component  1040  includes a sound processor or the like located in spine  330 . The sound processor is in electronic communication with headpiece  1041  via cable  348 . Headpiece  1041  can include an RF coil such as those detailed above. Concomitant with the teachings detailed above with respect to the sound processor of various other embodiments detailed herein, sound captured by the microphone  1026  is transduced into an electrical signal that is supplied to the sound processor, either directly or indirectly. The sound processor processes the signal and converts it into a signal or otherwise processes the signal so as to output a signal via cable  348  to the RF coil located in headpiece  1041 , where the RF coil functions according to the teachings detailed above, in at least some exemplary embodiments. 
     Headpiece  1041  includes a magnet apparatus  351 . This magnet apparatus can have the functionality of the subcomponent  550  detailed above. 
     While the embodiment depicted in  FIG. 10  utilizes a cable  348  to establish communication between the spine  330  and the headpiece  1041 , in an alternative embodiment, a wireless link is utilized to communicate between the spine  330  and the headpiece  1041 . 
       FIG. 11  depicts a cross-sectional view of the headpiece  1041 . Here,  FIG. 11  is presented with the same frame of reference with respect to  FIG. 4  detailed above. Like reference numbers have been utilized in some instances for convenience of conveyance of concept. As can be seen, headpiece  1041  includes a subcomponent  1050  and a subcomponent  1060 . In an exemplary embodiment, the subcomponent respectively corresponds, in a conceptual manner, to subcomponents  550  and  560  detailed above. In this regard, subcomponent  550  includes a housing  1148 , which contains an RF coil  542 . The housing  1148  comprises two sub housings that are joined together at seam  505 . Subcomponent  1050  includes cable jack  1181 , which is configured to connect the cable  348  to the headpiece  1041 . 
     Sub component  1060  includes housing  1162  which contains magnet  1064 . In an exemplary embodiment, the functionalities of the components depicted in  FIG. 11  can correspond to the functionalities of similar components presented in  FIG. 4 . In this regard, some of these functionalities will be described in detail below. Briefly, it is noted that the embodiment of  FIG. 11  is such that the housing  1148  has a height that is less than the housing  548  of the embodiment of  FIG. 4 . In the exemplary embodiment depicted in  FIG. 11 , there is no battery and no sound processor present in headpiece  1041  (because these components can be located in the spine  330 , where headpiece  1041  is in signal communication with via cable jack  1181 ). Thus, the housing can be thinner. Corollary to this is that in this exemplary embodiment, the magnet  1064  can be thinner than magnet  564  detailed above because, in this exemplary embodiment, the mass of the headpiece  1041  is less than the mass of the external component  540  (which contains a magnet, a sound processor, etc.). Thus, the strength of the magnet that is utilized to hold the external component (or pertinent portions thereof) against the skin of the recipient can be less for the embodiment of  FIG. 11  relative to that of the embodiment of  FIG. 4  to achieve the same result, all other things being equal. 
     In the embodiment of  FIG. 11 , the subcomponents interface with one another and are removable and/or attachable with respect to one another in a manner that is the same as or otherwise similar to the embodiment of  FIG. 4 , where again, additional details of such will be provided below. 
     In view of the embodiment of  FIG. 11 , it is to be understood that in an exemplary embodiment, there is a body piece, such as, for example, head piece  1041  (it is noted that in some alternate embodiments, the teachings detailed herein and/or variations thereof can be applicable to components that are not headpieces, but instead, or torso pieces and/or limb pieces etc.) configured for transcutaneous communication with a component implanted in a recipient (e.g., implantable component  450  of  FIG. 4 ). In view of  FIG. 11 , it can be seen that the body piece includes an RF coil  542  and a magnet apparatus in the form of a subcomponent  1060 . As can be seen, the RF coil is located on a first side of the body piece relative to an opposite side of the body piece. In this regard, with respect to a plane normal to longitudinal axis  599  bifurcating the geometric body established by the headpiece  1041  (a plane through the geometric center of the headpiece  1041 ), the RF coil  542  would be located entirely and/or a majority of the RF coil  542  would be located on one side of that plane. Here, the sides of the body piece can be side  544  and  546 , the side being opposite to one another. It is further noted that in an exemplary embodiment, with respect to a plane normal to the longitudinal axis  599  bifurcating the center of mass established by the subcomponent  1050  (i.e., without subcomponent  1040  which, owing to the weight of the magnet  1064  would bias the center of mass to one side versus the other a disproportionate amount), the RF coil  542  would be located entirely and/or a majority of the RF coil  542  would be located on one side of the plane. That said, in an alternate embodiment, with respect to a plane normal to the longitudinal axis  599  bifurcating the center of mass established by the entire headpiece  1041  (and also, with respect to the embodiment of  FIG. 4  (where external component  550  also corresponds to a body piece), a plane bifurcating center of mass established by the entire external component  540 ), the RF coil  542  would be located entirely and/or a majority of the RF coil  542  would be located on one side of this plane. 
     Consistent with the embodiments associated with  FIG. 4  detailed above, the body piece of this exemplary embodiment is configured such that the magnet apparatus  1060  is installable into the body piece from the first side. Still further, in at least some exemplary embodiments, the body piece is configured such that the magnet apparatus  1060  is rotationally lockable in place to the body piece. Again, some additional details of the arrangement whereby the subcomponents are locked together to each other are described in greater detail below. 
     Consistent with the teachings associated with  FIG. 4 , the embodiment of  FIG. 11  is such that the aforementioned first side is a skin interface side (side  544 ) that consists of a first structure and a second structure. Here, the first structure can correspond to the bottom subcomponent of the housing  1148  and/or  548  (e.g., with respect to the embodiment of  FIG. 4 , subcomponent  547 , which establishes surface  594 ). Still further, the second structure can be established by the magnet apparatus  1060  (or  560 ), where the bottom of housing  1162  (corresponding to housing  562  of the magnet apparatus  560 ) of magnet apparatus  1060  establishes surface  592 . In this exemplary embodiment, the first structure established by the housing  1148  houses or otherwise contains the RF coil  542 , and the second structure established by housing  1162  houses or otherwise contains the magnet  1064 . 
     With respect to the embodiments of  FIG. 4  and  FIG. 11 , it can be seen that in these exemplary embodiments, the housing of the subcomponent  1050  that contains the RF coil presents a complete barrier between the magnet of the respective embodiment and a side of the body piece opposite the aforementioned first side (the skin facing side, side  544 ). For example, with respect to  FIG. 8 , when looking at the recipient from that perspective, where the recipient is wearing the body piece, a portion of the housing entirely covers the magnet apparatus. That is, there is no passage from the “outside” (the side where the viewer is positioned) to the magnet apparatus, not even a pinhole. 
     As noted above, in an exemplary embodiment, the housing components can be formed as monolithic components. In this regard, in an exemplary embodiment, housing subcomponent  549  can be a monolithic component that extends completely across surface  598 , and in some embodiments, extends around surface  598  (e.g., down to seam  505  with respect to the embodiment of  FIG. 4 ). Conversely, with respect to the skin interface side  544 , while the respective surfaces  594  and  592  can be established by respective monolithic components (monolithic with respect to the surfaces—in an exemplary embodiment, housing  1162  can be made from two separate components that are snapped coupled together at the top, or elsewhere (e.g., lower), but if the bottom surface  592  is established by a monolithic sub housing component, the surface  592  is still established by a monolithic surface. Accordingly, in an exemplary embodiment, a first side of the body piece is established by two surfaces respectively established by monolithic structures with respect to those surfaces (e.g., surfaces  594  and  592 ) and the opposite side of the body piece from that first side is established entirely by one surface established by monolithic structure with respect to that surface. 
     Note further, that in an exemplary embodiment, the first side of the body piece (e.g., side  544 ) is established by two monolithic structures with respect to the first side. In this regard, these can be the monolithic structures of the housing subcomponent  547  and the housing  562 . It is noted that this feature is achieved even though the housing  548  is not in and of itself a monolithic structure, at least not where the two housing components are snapped coupled to one another or the like. Still further, that in this exemplary embodiment, the side of the body piece opposite the first side is established entirely by a second monolithic structure with respect to that side. Here, this can correspond to the sub component  549  of the housing  562  detailed above. 
     That said, some exemplary embodiments might include components that are located on surface  598  of housing  548 . For example, an emblem can be snapped coupled or otherwise adhesively coupled to surface  598 . Accordingly, in an exemplary embodiment, the side facing the viewer with respect to  FIG. 8  of the body piece can include a monolithic structure that extends completely across the body piece from one side to the other that provides no passage from the outside to the inside of the housing with respect to that side (there could be a passage on the lateral sides, such as the passage corresponding to  566 ). Such can be achieved via the embodiment of  FIG. 12 , which depicts emblem  1212  snap coupled to housing  548 , where housing subcomponent  549  includes a deviation  1221  in the housing wall thereof that provides space for the male portion of emblem  1212  that extends beyond the top of the housing  548  as seen, where deviation  1221  provides a barrier between the inside of the housing and the side of the housing  546  even though there is a hole through the top surface of the housing subcomponent  549 . 
     That said,  FIG. 13  depicts an alternate embodiment where there is a hole completely through the top wall  549  with no deviation  1221 , which hole is extended the male portion of the emblem  1212 , as can be seen. In this regard, the hole provides a passage from the outside of the housing  548  to the inside of the housing from the side  546  (even though the emblem  1212  fills or otherwise covers hole). Still, it can be seen that the subcomponent  547  of housing  548  provides a complete barrier between the magnet/magnet apparatus of the respective embodiment and a side of the body piece opposite (the skin facing side, side  544 ). Corollary to this is that the subcomponent  547  of housing  548  provides a complete barrier between the magnet/magnet apparatus and an interior of the housing  548 . 
     That said, with respect to the embodiments of  FIGS. 4 and 11 , where the housing subcomponent  549  include a monolithic component with respect to the portions thereof that extend across side  546 , a side of the body piece opposite the side configured to interface with skin of the recipient is contiguously jointless. That is, there is no joint between components establishing the side of the body piece on side  546 . Note that this is distinguished from a seamless configuration, where, for example, portions of housing subcomponent  549  can be welded together at locations on the side  546 , these welds not being a joint. That said, some embodiments are also contiguously seamless with respect to the side of the body piece opposite the side configured to interface with skin of the recipient. Such can be achieved via the utilization of a monolithic component extending across the side  546 . Such can be achieved, by way of example only and not by limitation, by an injection molding process and/or a blow molding process that results in a saucer shape component, as will be described in greater detail below. Accordingly, in an exemplary embodiment, the side  546  appears “clean” and unbroken and in some instances, uniform. By analogy, the side  546  could have the same structural visual attributes with respect to surface description as that of a car cab roof without a sunroof as compared to one with a sun roof. 
     The following features of some embodiments will be described with respect to  FIGS. 7 and 14 , where  FIG. 14A  depicts an isometric view of the subcomponent  560  containing the magnet  564 , which is not shown, because it is eclipsed or otherwise contained entirely within housing  562 . 
     As detailed above, some exemplary embodiments are configured such that the subcomponent  560  is configured to removably lock on to subcomponent  550  or otherwise into subcomponent  550 . In an exemplary embodiment, the body piece is configured such that the magnet is turned locked to the body piece. In an exemplary embodiment, the configuration is such that a quarter turn system is utilized, although some alternate embodiments can utilize other types of turns, such as by way of example, and eighth turn, or a one third turn, or a  5 / 16  turn, or even a half turn or more. Any turn arrangement that is related to turning the subcomponent  560  by an amount less than  360 ° that locks the subcomponent  560  to the subcomponent  560  is encompassed within the phrase “turn lock.” That said, any locking arrangement that will enable the teachings detailed herein or variations thereof to be practiced can be utilized in at least some exemplary embodiments. 
     That said, embodiments will be described in terms of a quarter turn system. As detailed above with respect to  FIG. 5 , an exemplary embodiment is such that the subcomponent  560  is configured to be moved upwards towards the subcomponent  550  in the direction of arrow  597 . In an exemplary embodiment, this can be done or otherwise is done until the subcomponent  560  is seated or otherwise aligned as shown in  FIG. 4 , or more specifically, this is done until the surface  592  is aligned with surface  594 , or otherwise such that the surface  592  is positioned relative to surface  594  in a manner having utilitarian value whether that be recessed or proud as the case may be. After this, the rotational torque is imparted on to the subcomponent  560  and/or the subcomponent  550  so as to turn the two components relative to one another (represented by arrow  598 ). With the embodiment associated with a quarter turn, the subcomponent  560  is turned about 90° (which includes 90°) so as to lock the subcomponent  560  in place, thus turn locking at the subcomponent  560 , and thus the magnet, to the headpiece. To remove the subcomponent  560  from the subcomponent  550 , and thus to remove the subcomponent  560  from the headpiece, the subcomponent is turned in the opposite direction by about 90°, and then the subcomponent  560  is moved in the direction of arrow  597  away from subcomponent  550 . (It is noted that this exemplary embodiment has been described in terms of moving the subcomponent  560  relative to the subcomponent  550 . It is to be understood that these results can be achieved by instead moving the subcomponent  550  relative to the subcomponent  560 . It is further to be understood that these results can be achieved by instead moving both components in opposite directions relative to one another. Thus, any disclosure of movement of one subcomponent corresponds to a disclosure of moving the other subcomponent in the opposite direction and/or moving both subcomponents in opposite directions.) 
     It is noted that the components utilized to configure the body piece to have the quarter turn lock arrangement are components that are part of the housings of the various subcomponents. In this regard, in an exemplary embodiment, the subcomponent  547  is molded or otherwise fabricated so as to have locking components as part of the housing. This is functionally represented by recess/female portion  587  as seen in  FIGS. 5  in  FIG. 6 . Also, in this regard, in an exemplary embodiment, the housing  562  is molded so as to have flange  1410  (as labeled in  FIGS. 7 and 14 ), which flange includes a female portion  1415  (or more than one on some other embodiments) and a plurality of male portions  1420 , where  FIG. 5  depicts the male portion  1420  received and the female portion  587 , thus locking the subcomponent  550  to the subcomponent  560  (and vice versa). 
     With reference to  FIG. 14A , it can be seen that the male portions  1420  are located about the perimeter of the flanged  1410  in a spaced apart manner. In an exemplary embodiment, male portions  1420  are spaced apart in an equally distant manner about the perimeter of the flange  1410 . In an exemplary embodiment, there are four male portions  1420 . That said, in alternate embodiments, there are fewer than four (e.g., 1, 2, or 3) and in other alternate embodiments there are more than four (e.g., 5, 6, 7, 8). Any arrangement or any number of male portions that can enable the teachings detailed herein and/or variations thereof to be practiced can be utilized in at least some exemplary embodiments. Still further, as can be seen, female portion  1415  is present so as to receive male portions of the housing subcomponent  547  (not shown in the figures), which male portions are located in an equally distant manner about the perimeter of the receptacle of the housings from portion  457  that receives the subcomponent  560 . In an exemplary embodiment, there are four male portions, although in other embodiments there are fewer portions (e.g., 1, 2, or 3) and in other embodiments there are more portions (e.g., 5, 6, 7, 8). While the embodiments detailed herein have been described is having a contiguous and single female portion with respect to the subcomponents, in alternate embodiments, the female portion can be bifurcated and/or trifurcated and/or quadfurcated, etc. and/or there can be a plurality of female portions. Any arrangement that can enable the turn locking detailed herein can be utilized in at least some exemplary embodiments. 
     Briefly, it is noted that the subcomponent  560  includes turnkey receptacles  1425  located at the bottom thereof. In an exemplary embodiment, these receptacles are arrayed so as to enable a key having dowel pins spaced in a manner so as to be received in the pattern arrayed by receptacles  1425  so that the key (or wrench) can impart the turning torque on to subcomponent  560  (or provide the reaction torque with respect to a scenario where the torque is applied to the subcomponent  550 ). While the embodiment depicted herein is presented in terms of circular holes  1425 , in alternate embodiments, such can be a single Allen wrench receptacle having a hexagon cross-section and/or a Phillips head screwdriver receptacle having the cruciform cross-section and/or a straight head screwdriver receptacle. That said, in an exemplary embodiment, the receptacle is configured so as to enable the torque/counter torque to be imparted utilizing a coin, such as by way of example only and not by way of limitation, an American currency quarter coin, or an equivalent sized Eurodollar coin, an Australian or New Zealand 10 cent coin, or an equivalent sized coin from another nation&#39;s currency, etc. 
       FIG. 15  depicts a reproduction of some of the portions of external component  540  of  FIG. 4 , where some components have been removed for purposes of ease of description. With respect to  FIG. 15 , it can be seen that there are planes  594  and  595 , which planes  594  and  595  are normal to the longitudinal axis  599  of the external component  540 , which axis  594  corresponds to, in this embodiment, the axis of winding of the RF coil  542  (i.e., the level of the locking location is on the same level as the coils with respect to location along the axis  599 ). The planes  594  and  595  are planes that extend out of the plane on which  FIG. 15  is printed. The planes  594  and  595  sandwich the coil  542  therebetween. Also seen between these planes is a male portion of the subcomponent  560  of the quarter turn locking arrangement. Thus, it can be seen that in some exemplary embodiments, the magnet is turned locked to the external component  540  in general, and the housing  548  of the external component  540  in particular, where the turn locking is at a locking location parallel to the RF coil with respect to an axis of winding of the RF coil and inside a perimeter of the coil in that at least a portion of the surfaces of the housing  548  and the housing  562  that interact with one another so as to establish the locking are between the planes  594  and  595 , where plane  594  located on the topmost coil portion and plane  595  is located on the bottommost coil portion. Accordingly, in an exemplary embodiment, the retention feature or otherwise the retention structure of the subcomponent  560  relative to subcomponent  550  is located on the same level were at least proximate to the level of the RF coil. In an exemplary embodiment, the retention features/structure is/.are entirely within the diameter of the RF coil 
     Thus, in an exemplary embodiment, there is a body piece that comprises a first housing that contains an RF coil (e.g., housing  548 ). The magnet apparatus is turn locked to the housing via a turn lock apparatus having surfaces that abut one another so as to hold the magnet apparatus to the first housing against a direction of gravity that are located entirely at least about parallel to the RF coil relative to a direction between the first side and the opposite side. These surfaces that abut one another are the surfaces of the male and female portions that support the magnet apparatus in the housing when the magnet apparatus is positioned with respect to the direction of gravity as that seen in  FIG. 15 . That is, other than the fact that these surfaces are abutting one another, the subcomponent  560  would drop down away from the subcomponent  550  (if held where the direction of gravity is downward with respect to the frame of reference of the figure—alternatively, if the subcomponent  550  was pulled away from the head of the recipient, and the subcomponent  560  was magnetically coupled to the implanted component, subcomponent  560  would remain held against the head of the recipient after subcomponent  550  was moved away). Still further, in an exemplary embodiment, it can be understood that the turn lock apparatuses are located entirely within an interior perimeter of the RF coil (i.e., the innermost diameter of the inner turn of the RF coil  542 ). 
     That said, alternate embodiments can be configured where the locking location is arranged such that the locking location is not directly within the planes, but still is about parallel with the RF coil with respect to the axis of winding of the RF coil such as can be seen with respect to  FIG. 16 . That said, it is noted that the embodiment of  FIG. 16  is presented more for purposes of illustration. In this regard, there is utilitarian value with respect positioning the coils  542  as close as possible to the surface assembly  596 . Thus, an exemplary embodiment, while not depicted in the figures, is that the coils  542  are arranged as seen in  FIG. 15 , but the locking location is located higher than that which is depicted in  FIG. 15 . 
     With respect to the distance of the coils  542  from surface  594 ,  FIG. 15  depicts an exemplary dimension  152  which is a distance from a tangent plane lying on the surface  594  at the bottommost portion thereof to the plane  595  which plane is located at the lowest most portion of the coil  542 . In an exemplary embodiment, this distance is about 0.5 mm or no more than about 0.5 mm. In an exemplary embodiment, this distance is about 1 mm or no more than about 1 mm. In an exemplary embodiment, dimension  152  is about or no more than about 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, or about 5.0 mm, or any value or range of values between any of these numbers in 0.01 mm increments (e.g., 0.33 mm, 1.12 mm, 0.22 mm to 3.33 mm, etc.). 
     It is noted that in an exemplary embodiment, some and/or all of the coils  542  are embedded in the material of the housing  548 . 
       FIG. 15  further depicts a dimension  151 , which represents the distance between the two parallel planes  595  and  594 , where plane  594  is the plane located on the up most portion of the coil  542 . In an exemplary embodiment, this distance is about 0.8 mm or no more than about 0.8 mm. In an exemplary embodiment, dimension  151  is about 1.8 mm or no more than about 1.8 mm. In an exemplary embodiment, the dimension  151  is about or no more than about 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, or about 5.0 mm, or any value or range of values between any of these numbers in 0.01 mm increments (e.g., 0.35 mm, 1.11 mm, 0.32 mm to 2.22 mm, etc.). 
     Again with reference to  FIG. 14A , it can be seen that the housing  562  is a structure that entails a first cylinder portion and a first disc portion, the first cylinder portion containing the magnet, the first disc portion corresponding to the portion that establishes the flange of which the locking components are part, the first disc portion also establishing the surface  592  (thus the first disc portion forms a portion of a skin interface side of the body piece). It can be seen that the first disc portion has a greater outer diameter than the first cylinder portion. 
       FIG. 14B  depicts an isometric view of an exemplary subcomponent  560 . As can be seen, the subcomponent  560  includes discontinuities in the top surface of the flange, which discontinuities permit male portions of the housing  548  to be fit therethrough during the action of moving the subcomponent  560  in the direction of arrow  597 . When the subcomponent  560  is rotated in the direction of arrow  598 , those male portions of the housing  548  fits into the female portions  1415 , thus locking the subcomponent  562  subcomponent  550 , because the male portion  1420  in general, and in particular, the bottom surface thereof, rests or otherwise interfaces with the top surface of the male portion of the housing  548 . 
       FIG. 14C  depicts an alternate embodiment of the magnet apparatus according to an exemplary embodiment, subcomponent  1460 . Subcomponent  1460  includes a magnet  1464  which is larger than magnet  564  detailed above, as can be seen. In an exemplary embodiment, the magnet  1464  is utilized to achieve a greater magnetic attraction between the external component and the implantable component. Additional details of such will be described in greater detail below. With respect to the embodiment of  FIG. 14C , is noted that the subcomponent  1460  comprises a first housing sub component  1462 A and a second housing subcomponent  1462 B, which sub components are separate and distinct from one another. Here, the subcomponents are respectively monolithic components. In an exemplary embodiment, the subcomponent snap coupled to one another thus retaining the magnets  1464  inside the resulting housing. In an alternative embodiment, the subcomponents are welded to one another. In an exemplary embodiment, both subcomponents are made from a polymer. In some other embodiments, one of the subcomponents can be made of metal and the other a polymer, or both can be made from metal, etc. Any arrangement that can enable the teachings detailed herein and/or variations thereof to be practiced can utilize in at least some exemplary embodiments 
     It is noted that any of the teachings detailed herein and/or variations thereof associated with the housing of the subcomponent  550  can correspond to the housing of subcomponent  1460  or  460 , and visa-versa. 
     As noted above, there can be utilitarian value with respect to some of the embodiments detailed herein and/or variations thereof in that the magnet apparatus/subcomponent  560  cannot be seen by the viewer detailed above with respect to  FIG. 8 . In this regard, in an exemplary embodiment, there is an exemplary body piece configured for transcutaneous communication with an implanted component implanted in a recipient, such as by way of example only and not by way of limitation, the embodiment of  FIG. 4  (external component  540 ). As detailed above, this exemplary body piece can include a first housing and a second housing that is a separate housing from the first housing (e.g., housing  548  and  562 , respectively). In the embodiment of  FIG. 4 , a magnet  564  is completely enveloped by the second housing  562 . Also, as can be seen from  FIG. 4 , the second housing forms an outer surface of the body piece (surface  592 —where surface  592  in conjunction with surface  594  forms the surface assembly  596  that abuts or otherwise interfaces with the skin of the recipient when external component  540  is magnetically coupled to the recipient). In this exemplary embodiment the first housing  548  completely covers the second housing  562  with respect to views of the body piece over 180 continuous degrees of polar angle about the first housing. In this regard,  FIG. 17  depicts external component  540 , with a frame of reference including axis  1794 , which is parallel to and lying on the plane established by surfaces  594  and  592 , and also including axis  1795 , which is normal to that plane and parallel to and lying on an otherwise concentric with the longitudinal axis  599  of the external component  540 /the axis of rotation of the coils  542 . Angle A 17  is the polar angle just described. As can be seen, the polar angle A 17  extends 180°. In this exemplary embodiment, the housing  562  is completely covered by the housing  548  over the 180° of the polar angle about the housing  548 . Conversely, the housing  548  does not completely cover housing  562  over an angle A 17  of 181 degrees or more, because once the viewer is below the plane established by the surfaces  594  and  592 , the surface  592  can be seen. That said, in some alternate embodiments, where the housing  562  or otherwise the subcomponent  560  is configured such that surface  592  is recessed relative to surface  594 , the angle A 17  could be greater than 180° that results in the housing  548  completely covering the housing  562 . Alternatively, in some alternate embodiments, where the housing  562  or otherwise the subcomponent  560  is configured such that surface  562  is proud relative to surface  594 , the angle A 17  would be less than 180° that results in the housing  540  a completely covering the housing  562 . 
     Accordingly, in an exemplary embodiment, there is a body piece such as those detailed herein and/or variations thereof where the first housing completely covers the second housing with respect to views of the body piece over at least 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210 degrees or more, or any value therebetween in 0.1 degree increments (e.g., over at least 155.2 degrees, 175.5 degrees, etc.). 
     Note that the polar angle can begin and end anywhere providing that is continuous. In this regard, it is to be understood that there are polar angles less than 180° that will always results in the housing  562  being viewed (e.g., where those angles are measured in the “southern hemisphere” as opposed to the “northern hemisphere” (i.e., the latter is above  1794 )). With respect to the aforementioned embodiment, the feature of the housing  548  completely covering the housing  562  over the 180 continuous degrees is achieved by measuring the angle completely in the “northern hemisphere” (i.e., above plane  1794 ). 
       FIG. 18  depicts schematically a polar angle A 18  of 170°. As can be seen, nowhere along the arc that forms the angle can the housing  562  be viewed, because housing  548  blocks the line of sight between the viewer and the housing  562 . 
     Corollary to this is that in an exemplary embodiment, the housing  548  completely covers the housing  562  with respect to views of the body piece over 360° of azimuthal angle about the housing  548 . In this regard, the azimuthal angle is the angle about longitudinal axis  599 .  FIG. 19  depicts this by way of schematic, where  FIG. 19  is a view of the external component  540  of  FIG. 4  (and  FIGS. 18 and 18 ) looking downward from the top (i.e., looking down with respect to the frame of reference of  FIG. 4 /looking “down the axis  599 ). Axes  1999  and  1994  have been superimposed onto external component  540 , where these axes are normal to each other. 
     The angle A 19  is presented as being about 350° for purposes of understanding. As just noted, in an exemplary embodiment, the housing  548  completely covers the housing  562  with respect to views of the body piece over 360° (A 19 =360°) of azimuthal angle. 
     In view of the above, it can be seen that the azimuthal angle is measured on a plane that is normal to the plane on which the polar angle is measured. Further as can be seen, the plane on which the azimuthal angle is measured is normal to the longitudinal axis  599 , and the plane on which the polar angle is measured is parallel to and lying on the longitudinal axis  599 . 
     The embodiments detailed above can be described in terms of generalized rectangular cuboids. In this regard,  FIG. 20  depicts a perspective view looking downwards at an angle from the top onto an exemplary generalized rectangular cuboid representing external component  540 , were surface  598  is the top surface. Subcomponent  550  is represented by cuboid  20550 , and subcomponent  560  is represented by cuboid  20560 .  FIG. 21  depicts a perspective view looking upwards an angle from the bottom on the generalized rectangular cuboid representing external component  540  of  FIG. 20 , where surface  592  is the bottom surface of the subcomponent  560  and surface  594  is the bottom surface of the subcomponent  550 .  FIG. 22  depicts a side view looking directly at the side of external component  540 . The dashed lines in these figures represent elements that are “eclipsed” by structure between the viewer and the elements represented by the dashed lines. As can be seen, in terms of the generalized rectangular cuboid, the housing of subcomponent  20560  is surrounded by the housing of subcomponent  20550  at a top side and all four side sides of the cuboid. 
       FIG. 23  presents a flowchart for an exemplary method  2300  according to an exemplary embodiment. Method  2300  includes method action  2310 , which entails obtaining a first portion of a headpiece (i.e., the subcomponent  550  of external component  540 ) for a prosthesis, wherein this first portion includes electronic components of the prostheses. Method  2300  further includes method action  2320  (note that these method actions need not be practiced in the order presented in  FIG. 23 , and unless otherwise specified, irrespective of the order in which these methods are presented, the in which they are presented does not correspond to a limitation on the order of practice), which entails obtaining a second portion of the headpiece (i.e., the subcomponent  560  of external component  540 ), the second portion including a first magnet (e.g., magnet  560 ). Method  2300  further includes method action  2330 , which entails attaching the second portion to the first portion by inserting the second portion into a receptacle of the first portion from a side of the headpiece configured to interface with skin of the recipient. In an exemplary embodiment, this entails moving the second portion into the receptacle in the first portion (the area in the bottom of housing subcomponent  547  that receives the housing  562  containing the magnet  564 ) in the direction of arrow  597 , and then rotating the housing  562 , and thus the subcomponent  560 , a quarter turn (90 degrees) in the direction of arrow  598  so as to lock the housing  562 /second portion to the first portion. In an exemplary embodiment, any of the attachment teachings detailed above can be utilized to practice method action  2330 , and variations thereof. 
       FIG. 24  depicts a flowchart for another exemplary method  2400  according to an exemplary embodiment. Method  2400  includes method action  2410 , which entails executing method  2300 . Method  2400  further includes method action  2420 , which entails removing the second portion from the first portion. Method action  2420  can be executed by first rotating the housing  562 , and thus the subcomponent  560  (the second portion according to this method), a quarter turn (90 degrees) in the opposite direction as that rotated during method action  2330  in the direction of arrow  598 , and then moving the housing  562 , and thus the subcomponent  560 , away from the housing  547 /receptacle therein (thus away from the first portion) in the direction of arrow  597 . Method  2420  can be executed according to any of the detachment teachings detailed above according to at least some exemplary embodiments. 
     Method  2400  further includes method action  2430 , which entails attaching a third portion to the first portion the third portion including a second magnet having a different strength and/or a different position relative to the first portion when the third portion is fully attached thereto. Method action  2430  can be executed according to method action  2330 , except with the third portion instead of the second portion. 
     In an exemplary embodiment, method  2400  has utilitarian value with respect to changing or otherwise adjusting the resulting magnetic attraction between the external component  540  and the implanted component  450 . In this regard, in at least some exemplary embodiments, the magnet or otherwise the ferromagnetic material implanted in the recipient as part of the implanted component  450  will generally not be removed in that it is implanted to be a permanent feature (i.e., not moved unless there is a failure of some implanted component warranting explanation, not moved unless there is significant obsolescence of the implanted component, not moved unless there is a significant physiological problem associated with the recipient warranting removal, etc.). Thus, the magnet or otherwise the ferromagnetic material implanted in the recipient will be a constant factor with respect to the magnetic attraction link between the external component and the implantable component. Thus, the ability to remove the magnet in the external component and replace it with a new magnet (and, thus an entirely new subcomponent  560 ) so as to obtain a different resulting magnetic strength between the external component and the implanted component can have utilitarian value. 
     That is, according to an exemplary embodiment, method  2400  results in the net attractive force being varied from that which was previously the case with the first portion. For example, by way of example only and not by way of limitation, holding all other variables constant, the magnetic flux that retains the external component  540  to the implantable component  450  can be varied such that the resulting retention force that holds the external component  540  to the skin of the recipient is different after the execution of method  2400  (greater or less—more on this below) relative to that which was the case with the permanent magnet arrangement of the second portion. 
     In an exemplary embodiment, method  2400  can be executed multiple times for different portions (a fourth portion, a fifth portion, a sixth portion, a seventh portion, etc.), each resulting in a different magnetic attraction force between the external component  540  and the implantable component  450 . Thus, in an exemplary embodiment, there is utilitarian value with respect to executing method  2400  and variations thereof in that the resulting attraction force can be “customized,” at least within a range of possible forces owing to the respective resulting attraction force resulting from a given subcomponent  560  that is utilized with the subcomponent  550 . That is, in an exemplary embodiment, method  2400  can be executed so as to “test” various subcomponents  460  so as to “test” respective attraction forces to determine which one is more comfortable and/or which one provides the desired utilitarian results relative to the others. 
     It is noted that in an exemplary embodiment, methods  2300  and  2400  further includes the action of inserting the second portion into the first portion without moving any subportion of the first portion relative to any other subportion of the first portion. In this regard, in an exemplary embodiment, the action  2330  is executed entirely by moving the first portion and the second portion relative to one another. For example, owing to the turn lock arrangement, the external component does not include any other locking mechanism or otherwise does not require any other component to be removed and/or actuated so as to enable the attachment and/or detachment of the second portion relative to the first portion. It is further noted that in an exemplary embodiment, when the first portion is attached to the second portion, the headpiece (bodypiece) is complete, at least with respect to the methods  2300  and/or  2400  detailed herein. 
       FIG. 25  presents a chart that depicts an exemplary graph of attraction force in Newtons between the external components  540  and the implantable component  450  for various portions (P2, P3, P4, P5, P6, P7, P8) which corresponds to the top component  560  containing the magnet. As can be seen, each one results in a different attractive force for the given implant, it is noted that these results are exemplary in nature, and are based on a statistically significant sample of a given population (i.e., one having a skin thickness overlying the implantable component  450  falling within a given human factors classification, etc.). 
     It is noted that as a general rule, stronger magnets  564  and/or magnets positioned closer to the surface  592  would result in stronger attractive forces, all things being equal (more on this below). 
     To be clear, the data depicted in  FIG. 25  is exemplary to illustrate a general concept for some embodiments. That said, the data is accurate for other embodiments. 
     As can be seen from the graph of  FIG. 25 , in at least some embodiments, embodiments of the teachings detailed herein can result in the attraction force between the external component  540  and the implantable component  450  being varied as a result of the substitution of the subcomponent  560  such that the attraction force can be reduced to approximately 10% of the maximum attraction force (i.e., the force resulting from the utilization of the second portion). 
     It is noted that while the embodiment of method  2400  has been presented in terms of removing the second portion and substituting the second portion for the third portion, in an alternative embodiment, method  2400  can be executed in terms of removing the second portion and substituting that for the fourth portion or the fifth portion or the six portion with the seventh portion with the eighth portion. Still further, it is noted that in an exemplary embodiment, method  2300  can be executed by placing another portion other than the second portion into the external component (e.g., the third portion, the fourth portion, the fifth portion, six portion, the seventh portion, the eighth portion, etc.). That is, in an exemplary embodiment, method  2400  need not necessarily start or otherwise proceed with the “strongest” resulting magnetic attraction between the external component and the implantable component, and that method  2400  can result in the substitution of the various portions so that the results of the method is that an increase in the magnetic force between the external component and the implantable component results. 
     Any arrangement or variation of the given methods detailed herein that can have utilitarian value can be utilized at least some exemplary embodiments. 
     That said, with respect to method  2400 , where the second portion and the third portion are generic portions, and thus are not directly tied to the data presented on  FIG. 25 , in at least some embodiments, the execution of method  2400  results in the attraction force between the external component  540  and the implantable component  450  being varied relative to that which was the case at the commencement and of method  2300  such that the attraction force between the external component and the implantable component is reduced or increased by approximately 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 15%, 10%, 5% or less or about any value there between in about 1% increments (e.g., about 64%, about 17%, etc.). (That is, the resulting difference in changing one portion out and replacing it for another portion can be any of these values.) 
     Thus, in view of the above, in an exemplary embodiment, method  2400 , or, more particularly, method actions  2420  and  2430  can result in the adjustment of a generated magnetic flux generated at least in part by the external component, so as to vary the resulting magnetic retention force between the external component and the implantable component, solely due to the replacement of the subcomponent  460 , from a maximum retention force (all other variables held constant) to a retention force that is less than any of about 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 15% , 10% or about 5% of the initial force (the force resulting from the execution of method  2300 ), or any value there between as detailed above. 
     Any force can enable the teachings detailed herein to be practiced (e.g., retaining an external component of a bone conduction device to a recipient to evoke a hearing percept) can be utilized in at least some embodiments. 
       FIGS. 26-28  some exemplary configurations of the subcomponents containing the magnets according to some exemplary embodiments that results in a different magnetic retention force between the external component and the implantable component, all other things being equal.  FIG. 26  depicts an exemplary subcomponent  26560  that includes an exemplary magnet  26564 . In an exemplary embodiment, subcomponent  26560  can correspond to P 2  on the graph of  FIG. 25 .  FIG. 27  depicts an exemplary subcomponent  27650  that includes an exemplary magnet  27564 , which magnet has a lower strength then the magnet  26564  of the embodiment of  FIG. 26 . This is depicted by way of example for illustration purposes with respect to a magnet that is “smaller” (here, less thick) than the magnet of  FIG. 26 . Here, for purposes of ease of manufacture, spacers  2710  have been located in the housing of the subcomponent  27560  so as to maintain the location of the magnet  27564 . That said, in an alternate embodiment, the housing of the subcomponent  27560  can be thinner such that there is no space in the housing that permits the magnet to move relative to the locking portions for example. In an exemplary embodiment, this arrangement of  FIG. 27  can correspond to P 4  on the graph of  FIG. 25 . 
       FIG. 28  depicts yet another exemplary subcomponent  28560  that includes the magnet  27564  utilized in the embodiment of  FIG. 27 , except that the magnet is positioned a greater distance from surface  562  than that which is the case in the embodiment of  FIG. 27 . Here, spacers  2710  are utilized to keep the magnet further away from surface  562  than that which was the case in the embodiment of  FIG. 27 . Because the resulting distance between the magnet  27564  and the magnet implanted in the implantable component (or otherwise the ferromagnetic material implanted in the implantable component) is greater embodiments utilizing sub component  28560  relative to that which was the case in utilizing the embodiment of  FIG. 27 , the resulting magnetic attraction force is lower relative to that which is the case with the embodiment of  FIG. 27 , all other things being equal. In an exemplary embodiment, the subcomponent  28560  can correspond to P 6  on the graph of  FIG. 25 . 
     It is further noted that alternate embodiments can utilize different regimes or arrangements to obtain a different magnetic force for a given subcomponent. For example, a second magnet can be included in the housing, which magnet is arranged with polarities that are opposite to the magnet  27564 , so as to lessen the resulting magnetic force. Alternatively and/or in addition to this, magnets with polarities that are lined can be added so as to increase the magnetic force. Any arrangement that can be utilized to vary the resulting magnetic force that results from one subcomponent to the other subcomponent can be utilized in at least some exemplary embodiments. 
     In an exemplary embodiment, the various portions corresponding to the various subcomponents  560  have a distinct appearance relative to one another. In an exemplary embodiment, the various portions that are removed and/or attached from the subcomponent  550  utilized in executing method  2400  have different color and/or a different indicia relative to one another. In this regard, in an exemplary embodiment, the third portion can have at least one of a different color or a different indicia then the second portion that is visible from the outside of the headpiece when the portions are fully attached to the first portion. By way of example only and not by way of limitation, P2 can be red, P3 can be green, P4 can be blue, P5 can be purple, P6 can be black, P7 can be white, and P8 can be orange (for example, the surface  592 , or at least a portion thereof, can be these colors). Still further, in an exemplary embodiment, P2 can be marked with the indicia “1,” P3 can be marked with the indicia “2,” P4 can be marked with the indicia “3,” etc. (for example, the surface  592  can have these indicia printed thereon). That said, in an alternate embodiment, the various portions can have the same color and/or the same indicia. Still, in embodiments where the various subcomponents  560  are identifiably visibly different from one another, especially from the outside of the external component when the subcomponent  560  is fully attached to the subcomponent  550  (i.e., completely inserted and turn locked thereto), such can have utilitarian value with respect to being able to differentiate or otherwise relatively quickly determine the general magnetic force that results from the utilization of a given subcomponent  560 . Such can have utilitarian value with respect to an audiologist or other healthcare professional, or even the recipient determining or otherwise experimenting with various subcomponents  560  to determine the magnetic attraction that has utilitarian value for that recipient. Alternatively and/or in addition to this, such can have utilitarian value with respect to adjusting the magnetic strength of the attraction force between the external component and the implantable component depending on the given scenario of use. For example, when the recipient is going jogging or the like, thus experiencing impact G forces that are higher than when the recipient is not jogging (working at his or her desk), a subcomponent  560  that results in a stronger magnetic force can be utilized. Thus, in an exemplary embodiment, method  2400  is executed when the recipient anticipates that a stronger force will be needed or otherwise utilitarian to hold the external component in place because the recipient will engage in an activity that results in greater G forces than that which was the case during previous scenarios of use. Still further, in an exemplary embodiment, method  2400  is executed when the recipient anticipates that a weaker force will be needed or otherwise utilitarian to hold the external component in place because the recipient will engage in an activity that results in minimal G additional forces beyond that which results in the general pull of gravity, relative to that which was the case during a previous scenario of use. 
     It is noted that at least some exemplary embodiments can have utilitarian value with respect to an embodiment where the body piece is a headpiece (e.g., it will not be covered by clothing and will be relatively readily viewed by a viewer), in that the magnet apparatus (e.g., the portion corresponding to subcomponent  560 ) in general, and the housing containing the magnet in particular, has a distinctly different appearance than the housing in which the RF coil is located (the housing  548 , for example). By “distinctly different appearance,” it is meant that the appearance of the magnet apparatus is such that, when the magnet apparatus is fully attached to the housing  548 , the viewer will readily see that the components are two different components owing to a clear discontinuity between the appearance thereof. For example, the color of the housing in general, or the color of the under surface of the housing in particular (surface  594 ), could be black, and the color of the magnet apparatus/housing containing the magnet, with the color of the surface that is exposed when the magnet apparatus is fully attached to the housing  548  (surface  592 ) is white, or red, or green, etc. That is, the magnet apparatus is such that the person of ordinary skill in the art would recognize that it was more likely than not that the appearance thereof was purposely meant to be different than that of the housing  548 . This as opposed to, for example, an embodiment where all surfaces  592  and  594  are the same color. Another example of a distinctly different appearance could be markings on the magnet apparatus (e.g., words printed on the surface  592  such as “Rotate To Remove” or “Magnet Apparatus,” etc.). Again, this is entirely based on the understanding of the person of ordinary skill in the art. All of this is as opposed to an embodiment where the magnet apparatus is of a design where the magnet apparatus does not have a distinctly different appearance than the housing. (Of course the two components will be different, but by way of analogy, a car door will still “blend” with the fender on a typical new car—car doors are typically not a different color than the fender.) 
     It is noted that in some exemplary embodiments, the interiors of the housings detailed herein are fluidically isolated from an ambient environment thereof and/or from one another. With reference back to  FIG. 6 , it can be seen that the interior  648  of housing  548  is completely isolated from the ambient environment (i.e., the outside) thereof except for hole  566 . (It is noted that in some embodiments, hole  566  is not present, and a microphone or other sound capture apparatuses located outside the housing  548  and is in wireless signal communication with the sound processor therein.) When the sound capture apparatus (e.g. microphone) is positioned therein, the hole  566  is thus sealed. Accordingly, the interior  648  becomes fluidically isolated from the ambient environment. In an exemplary embodiment, the interior  648  is hermetically sealed from the ambient environment. In an exemplary embodiment, the interior is sealed in a water resistant or a waterproof/watertight manner. Now with reference back to  FIG. 7 , it can be seen that the interior  760  of housing  562  is completely isolated from the ambient environment (i.e., the outside) thereof. Accordingly, the interior  760  is fluidically isolated from the ambient environment. In an exemplary embodiment, the interior  760  is hermetically sealed from the ambient environment. In an exemplary embodiment, the interior  760  is sealed in a water resistant or a waterproof/watertight manner. Indeed, as noted above, in an exemplary embodiment, the housing  562  is cast about the magnet therein. That said, it is noted that in some exemplary embodiments, the interior  760  of housing  562  is not sealed or otherwise not fluidically isolated from an ambient environment. Still, in such an embodiment where housing  562  is used in conjunction with housing  548 , if housing  548  is sealed as detailed above, and interior of housing  548  can be fluidically isolated from an interior of housing  562 , and visa-versa. Conversely, in an embodiment where housing  562  is sealed according to the teachings detailed herein, but housing  548  is not so sealed, housing  562  can be fluidically isolated from housing  548 , and visa-versa. 
       FIG. 29  depicts an isometric exploded view of housing  548  according to an exemplary embodiment. As can be seen, and interior isometric view of the housing subcomponent  547  is depicted, along with an exterior isometric view of the housing subcomponent  549 . As can be seen, both are jointless and seamless. In an exemplary embodiment, these components are made by injection molding or blow molding or other forming techniques that have utilitarian value with respect to making the housing components detailed herein and/or variations thereof. 
     As noted above, in an exemplary embodiment, subcomponent  547  and  549  are polymer-based components, such as by way of example only and not by way of limitation, components that are made from hard plastic. That said, in an alternate embodiment, these components can be metallic component based components for subcomponent  549 , and ceramic based component for subcomponert  547 . In some alternate embodiments, all is made of metal. Any arrangement that can enable the teachings detailed herein and/or variations thereof to be practiced can be utilized in at least some exemplary embodiments. 
     In an exemplary embodiment, an exemplary manufacturing method entails placing the battery, the PCB, the RF coil etc. into the interior of the subcomponent  547 , and then placing the subcomponent  549  over those components and otherwise attaching subcomponent  549  two subcomponent  547 . In an exemplary embodiment, the subcomponents snap couple or otherwise interference fit to one another, leaving a joint at the interference location about the perimeter of those two components of the mating section. In an alternate embodiment, and/or in addition to this, the subcomponents are welded together, thus resulting in a seam at the perimeter. 
     It is briefly noted that some embodiments can have a composite subcomponent housing arrangement. For example, with reference to  FIG. 30 , it can be seen that the housing  548  includes a skin interface structure  3194 . In an exemplary embodiment, skin interface structure  3194  can be made of a skin friendly material. In an exemplary embodiment, this can be made of PEEK. In an exemplary embodiment, skin interface structure  3194  provides a barrier between the skin and the housing structure  548 . In an exemplary embodiment, such as where the housing  548  is made of titanium, the skin interface structure  3194  can act as a thermal barrier between the structure  548  and the skin (e.g., so that the recipient does not feel a sensation of cold metal against the skin). In a similar vein, such a skin interface structure  3194  can also be placed on the bottom of the housing  562  for subcomponent  560 . 
       FIG. 31  depicts yet another exemplary alternate embodiment of the housing  548 . Here, in addition to the subcomponents  547  and  549 , a subcomponent  3130  is also provided. In this exemplary embodiment, subcomponent  3130  servers interface between subcomponents  547  and  549 . As can be seen, subcomponent  3130  includes a hole  3132  for a sound capture apparatus, although in other embodiments, there is no such hole on the outside of subcomponent  3130 . Still further, in an exemplary embodiment, subcomponent  3130  can be a component that supports or otherwise is attached to the PCB. In an exemplary embodiment, all components inside the housing  548  can be mounted to  3130  in a manner that establishes  3130  as a chassis or the like, where subcomponents  547  and  549  correspond to a body of the external component. 
     In an exemplary embodiment, there is a body piece configured for transcutaneous communication with an implanted component implanted in a recipient, comprising: 
     a first housing 
     a magnet; and 
     a second housing, wherein 
     the second housing completely envelops the magnet, 
     the second housing forms an outer surface of the body piece, and 
     at least one of:
         the first housing completely covers the second housing with respect views of the body piece over 360 degrees of azimuthal angle and at least 170 continuous degrees of polar angle about of the first housing; or       

     the body piece is configured such that the second housing installable into a receptacle established by the first housing at a skin interface side of the body piece, wherein, the second housing is a structure having a first cylinder portion and a first disk portion, the first disk portion having a greater outer diameter than the first cylinder portion, the first disk portion forming a portion of a skin interfacing side of the body piece, the second housing is a structure having a first cylinder portion and a first disk portion, the first disk portion having a greater outer diameter than the first cylinder portion, the first disk portion forming a portion of a skin interfacing side of the body piece, the first disk portion includes a turn lock apparatus that interfaces with a turn lock apparatus of the first housing; the first housing includes an RF coil that extends about the first disk; and the turn lock apparatuses are located at about the same height of the body piece as the RF coil, and the turn lock apparatuses are located entirely within an interior perimeter of the RF coil. 
     It is noted that any disclosure of a device and/or system herein corresponds to a disclosure of a method of utilizing such device and/or system. It is further noted that any disclosure of a device and/or system herein corresponds to a disclosure of a method of manufacturing such device and/or system. It is further noted that any disclosure of a method action detailed herein corresponds to a disclosure of a device and/or system for executing that method action/a device and/or system having such functionality corresponding to the method action. It is also noted that any disclosure of a functionality of a device herein corresponds to a method including a method action corresponding to such functionality. Also, any disclosure of any manufacturing methods detailed herein corresponds to a disclosure of a device and/or system resulting from such manufacturing methods and/or a disclosure of a method of utilizing the resulting device and/or system. 
     Unless otherwise specified or otherwise not enabled by the art, any one or more teachings detailed herein with respect to one embodiment can be combined with one or more teachings of any other teaching detailed herein with respect to other embodiments. 
     While various embodiments have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.