Patent Publication Number: US-2022225038-A1

Title: Hearing-aid device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority, under 35 U.S.C. § 119, of German Patent Application DE 10 2021 200 195.5, filed Jan. 12, 2021; the prior application is herewith incorporated by reference in its entirety. 
     FIELD AND BACKGROUND OF THE INVENTION 
     The invention relates to a hearing-aid device and in particular to a hearing-aid device in the form of a conventional hearing aid. 
     Typically, hearing-aid devices refer to conventional hearing aids which serve for the treatment of the hard of hearing. In a broader sense, that term however also refers to devices formed to assist persons with normal hearing. Hearing-aid devices for assisting persons with normal hearing are also referred to as “personal sound amplification products” or “personal sound amplification devices” (abbreviated as “PSAD”). In contrast to conventional hearing aids, such hearing-aid devices are not provided to compensate for a loss of hearing but are used in targeted fashion to assist and improve the normal human hearing ability in specific hearing situations, for example for assisting with animal observations, in order to be able to better perceive animal sounds and other noises produced by animals, to assist hunters on the hunt, for sports reporters to facilitate improved speech and/or understanding of speech in complex background noise, for musicians to reduce the load on the sense of hearing, etc. 
     Independently of the intended use, hearing-aid devices usually include at least an input transducer, a signal processing apparatus and an output transducer as necessary components. As a rule, the at least one input transducer is formed by an acoustoelectric transducer in that case, that is to say, for example, by a microphone, or by an electromagnetic reception device, for example an induction coil. Even a plurality of input transducers are installed in many cases, that is to say for example one or more acoustoelectric transducers and an electromagnetic reception device. An electroacoustic transducer is usually used as the output transducer, for example a miniaturized loudspeaker (which is also referred to as a “receiver”) or an electromechanical transducer, for example a bone conduction receiver. As a rule, the signal processing apparatus is realized by an electronic circuit provided on a printed circuit board and independently thereof usually has an amplifier. 
     Moreover, hearing-aid devices are frequently equipped with a transmitter and/or reception unit, which facilitates wireless communication with other electronic devices, in particular with other hearing-aid devices (e.g., for forming a binaural hearing-aid device system or hearing-aid system), with remote controls, with programming devices or with cellular telephones. In that case, the wireless communication is typically implemented by using electromagnetic waves in the radiofrequency range of 500 kHz to 5 GHz, that is to say for example in the frequency range from 1 MHz to 50 MHz or, for example, using Bluetooth technology, at approximately 2.4 GHz. 
     A problem in the case of hearing-aid devices with such a transmitter and/or reception unit lies in the realization of the antenna required to that end, since conventional antenna structures cannot be readily used due to the free wavelength of more than 10 cm corresponding to the aforementioned frequency range and due to the electrically small volume of conventional hearing-aid devices. That problem is becoming weightier with the advancing miniaturization of hearing-aid devices. 
     SUMMARY OF THE INVENTION 
     It is accordingly an object of the invention to provide an advantageously constructed hearing-aid device, which overcomes the hereinafore-mentioned disadvantages of the heretofore-known devices of this general type. 
     With the foregoing and other objects in view there is provided, in accordance with the invention, a hearing-aid device, in particular in the form of a conventional hearing aid, comprising a signal processing apparatus for processing input signals and for outputting output signals, a loudspeaker unit with a loudspeaker and with a conductor connection, through the use of which the loudspeaker is electrically conductively connected to the signal processing apparatus, a transmitter and reception unit with a coupling element, and a coupling formed over at least one galvanic isolation point between the coupling element and the conductor connection in such a way that at least a part of the loudspeaker unit is used as an antenna structure in transmission and reception operation. 
     Preferred developments are contained in the dependent claims. 
     In this context, an appropriate hearing-aid device is typically constructed in the manner of one of the hearing-aid devices described at the outset, and in particular as a conventional hearing aid. Independently thereof, the hearing-aid device includes a signal processing apparatus which is configured to process electrical input signals from an input transducer and to output electrical output signals. In this context, an amplifier or an amplifier function then is typically realized with the signal processing apparatus. Further, the hearing-aid device includes a loudspeaker unit with a loudspeaker as an output transducer and with a conductor connection, through the use of which the loudspeaker is electrically conductively connected to the signal processing apparatus for the purposes of transmitting the electrical output signals from the signal processing apparatus to the loudspeaker. In this context, the loudspeaker unit typically is a functional unit, but not necessarily a modular unit. Moreover, the hearing-aid device includes a transmitter and reception unit with a coupling element, in particular for wireless communication as described at the outset with other electronic devices, wherein a coupling is formed over at least one galvanic isolation point, that is to say a galvanic isolation point of the coupling, between the coupling element and the conductor connection. 
     In this case, the coupling is expediently formed as an inductive and/or as a capacitive coupling. As a consequence of this coupling, electrical energy is transferred over the at least one galvanic isolation point in a transmission and reception operation of the hearing-aid device. Since as a result thereof electrical energy is coupled into the coupling element or the conductor connection depending on the direction of the energy flow, the at least one galvanic isolation point of the coupling is also referred to below as the at least one coupling point. As a result of the coupling, at least a part of the loudspeaker unit is then used as an antenna structure in the transmission and reception operation of the hearing-aid device. 
     Not only is no galvanic connection typically formed at the at least one galvanic isolation point of the coupling, but no galvanic connection is formed anywhere between the coupling element and the conductor connection. Independently thereof, the at least one galvanic isolation point of the coupling is usually not formed over the entire extent of the coupling element and/or the entire extent of the conductor connection, but preferably in a restricted spatial region. The coupling is effective or at least significantly effective, at least during the transmission and reception operation, only in this spatial region, which is also referred to as the coupling spatial region. Expediently, this spatial region is structurally specified by the construction of the coupling, that is to say in particular also by virtue of whether the coupling is constructed as an inductive and/or capacitive coupling. 
     As a result of the coupling thus constructed, at least a part of the loudspeaker unit is used as an antenna structure during the transmission and reception operation. In this case, the antenna structure, that is to say in particular at least a part of the conductor connection and/or at least a part of the loudspeaker, then forms for example an antenna fed by the coupling element. Alternatively, the antenna structure complements the coupling element and forms for example a type of passive antenna structure. That is to say, the antenna structure, i.e., in particular at least a part of the conductor connection and/or at least a part of the loudspeaker, acts as an effective antenna of the hearing-aid device or at least as part of an effective antenna of the hearing-aid device, at least in the transmission and reception operation. This antenna then complements the transmission and reception unit in such a way that a wireless communication, as described at the outset, with other electronic devices is possible. In this case, electromagnetic waves are emitted in the transmission operation by the antenna structure, that is to say in particular by the at least one part of the conductor connection and/or by the at least one part of the loudspeaker, and in some cases moreover also by the coupling element, and electromagnetic waves are received in the reception operation. 
     Further, the transmission and reception unit is usually configured to generate antenna signals and feed the antenna therewith during transmission operation. Moreover, the transmission and reception unit is expediently configured to process antenna signals which are transferred from the antenna to the transmission and reception unit during reception operation. To this end, the transmission and reception unit for example includes a so-called RF (radiofrequency) chip, that is to say an RFIC (radiofrequency integrated circuit) element. Then, wireless communication is typically effected by using electromagnetic waves in the radiofrequency range of 500 kHz to 5 GHz and in particular in the frequency range from 500 MHz to 5 GHz, that is to say for example using Bluetooth technology at approximately 2.4 GHz. 
     Depending on the application, the coupling is further constructed as a direct or as an indirect coupling, with the coupling element being directly coupled to the conductor connection in the case of direct coupling and the coupling element being indirectly coupled to the conductor connection through a bridge element in the case of indirect coupling. This bridge element expediently is an additional component or an additional assembly. 
     Particularly if an aforementioned bridge element is provided, an expedient configuration furthermore has at least two galvanic isolation points of the coupling or two coupling points formed between the coupling element and the conductor connection, these galvanic isolation points or coupling points preferably being spatially separated from one another and in particular connected in series as it were. In these cases, the coupling between the coupling element and the conductor connection is then typically composed of two partial couplings, specifically a first partial coupling over one of the at least two galvanic isolation points of the coupling and a second partial coupling over the other of the at least two galvanic isolation points of the coupling. Depending on the configuration variant, the first coupling then is formed for example as an inductive or at least predominantly inductive coupling and the second partial coupling is formed as a capacitive or predominantly capacitive coupling, in such a way that then in total the coupling between the coupling element and the conductor connection is both inductive and capacitive. 
     In embodiment variants of the hearing-aid device with a bridge element, the bridge element has a first bridge part and a second bridge part in some cases. Then, the at least one galvanic isolation point of the coupling is formed for example between the first bridge part and the second bridge part. That is to say that a capacitor with two connection arms is disposed between the coupling element and the conductor connection for example, one of these two connection arms being electrically conductively connected to the coupling element and the other of the two connection arms being electrically conductively connected to the conductor connection. Depending on the embodiment variant, an appropriate capacitor is formed by a so-called SMD (surface-mounted device) component in this case. 
     In embodiments of the hearing-aid device with a bridge element, an advantageous configuration is also one where the coupling element and/or the connector connection is galvanically connected to the bridge element, to be precise in such a way that the bridge element is formed as a type of branch in particular, which branches from the coupling element or the conductor connection. Depending on the embodiment variant, a corresponding galvanic connection between the coupling element and the bridge element or between the conductor connection and the bridge element has at least one resistor and/or a soldered connection, welded connection, adhesive connection or crimped connection. 
     Furthermore, embodiments in which the bridge element is formed on a printed circuit board, in particular a flexible printed circuit board, and for example has a number of conductor tracks formed on a printed circuit board, are advantageous. 
     Independently of whether or not the hearing-aid device has an above-described bridge element, it is moreover advantageous if the at least one galvanic isolation point of the coupling is formed on a printed circuit board, that is to say for example on the aforementioned printed circuit board. Such an embodiment of the at least one galvanic isolation point of the coupling on a printed circuit board is particularly advantageous if the at least one galvanic isolation point of the coupling is formed by two capacitively or at least predominantly capacitively coupled electrode elements. In this case, the relative arrangement and relative alignment of the electrode elements required for the capacitive coupling can be realized particularly easily. 
     An embodiment of the at least one galvanic isolation point of the coupling by way of two capacitively coupled electrode elements may however alternatively also be realized without a printed circuit board. In such a case, wire elements for example form the electronic elements. In order to realize a desired relative arrangement and relative alignment with respect to one another, at least one of the two wire elements then preferably is enveloped by an insulation for example, for example by enamel, and the wire elements are then preferably interconnected, that is to say in particular in integral fashion, through this insulation or the insulations of the wire elements. 
     Independently thereof it is expedient if at least one aforementioned partial coupling or the coupling over the at least one galvanic isolation point is formed as a capacitive or at least predominantly capacitive coupling. By way of example, such a partial coupling or coupling is then realized by using a capacitor. Depending on the embodiment variant, such a capacitor is disposed between for example the coupling element and conductor connection, between the bridge element and coupling element, between the bridge element and conductor connection or between the first bridge part and second bridge part, with the capacitor in particular having or forming the at least one galvanic isolation point of the coupling. Depending on the embodiment variant, an appropriate capacitor is formed in this context by an aforementioned SMD component. Alternatively, such a capacitive or at least predominantly capacitive partial coupling or coupling is formed by using two of the aforementioned electrode elements. 
     It is likewise expedient if at least one aforementioned partial coupling or the coupling is formed over the at least one galvanic isolation point as an inductive or at least predominantly inductive coupling. By way of example, such a partial coupling or coupling is then realized by using two coupled conductor loops. In this case, an appropriate conductor loop preferably extends over an angle greater than or equal to 180°. 
     If now an aforementioned partial coupling or the coupling is formed over the at least one galvanic isolation point as a capacitive or at least predominantly capacitive coupling and if such a capacitive or at least predominantly capacitive partial coupling or coupling is formed by using two aforementioned electrode elements, these electrode elements are typically disposed parallel to one another. In this case, the electrode elements preferably each have a length L greater than or equal to 2 mm, further preferably greater than or equal to 5 mm and in particular greater than or equal to 10 mm. If the electronics elements are formed by wire elements or conductor tracks in this case, the sections of the wire elements or the sections of the conductor tracks which are disposed parallel or at least substantially parallel to one another have the aforementioned length L. 
     In an advantageous development, the aforementioned electrode elements or the aforementioned sections of the wire elements or the conductor tracks, which are disposed in parallel in particular, are disposed at a distance A from one another which is less than or equal to 5 mm, further preferably less than or equal to 2 mm, in particular less than or equal to 0.5 mm. Moreover, in the case of a distance of A=x, the length L preferably ranges between 0.25x and 0.55x and, in particular, between 0.35x and 0.45x, that is to say at 0.4x, for example. 
     Further, the above-described concept of the coupling between the coupling element and conductor connection is particularly advantageous in the case of so-called BTE (behind the ear) hearing-aid devices and therefore the hearing-aid device according to the invention preferably is constructed as such a BTE hearing-aid device. A corresponding hearing-aid device then typically has a main housing or BTE housing, which is constructed to be worn behind an ear of a user and in which the signal processing apparatus, the loudspeaker with the conductor connection, and the transmission and reception unit with the coupling element, are positioned. 
     Other features which are considered as characteristic for the invention are set forth in the appended claims. 
     Although the invention is illustrated and described herein as embodied in a hearing-aid device, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims. 
     The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is a diagrammatic plan view of a first embodiment of an assembly of a hearing-aid device including a coupling element and including a connection conductor which is coupled through a coupling to the coupling element and which serves to connect a loudspeaker and a signal processing unit; 
         FIG. 2  is a plan view of a second embodiment of the assembly of the hearing-aid device; 
         FIG. 3  is a plan view of a third embodiment of the assembly of the hearing-aid device; 
         FIG. 4  is a plan view of a fourth embodiment of the assembly of the hearing-aid device; 
         FIG. 5  is a plan view of a fifth embodiment of the assembly of the hearing-aid device; 
         FIG. 6  is a plan view of a sixth embodiment of the assembly of the hearing-aid device; 
         FIG. 7  is a plan view of a seventh embodiment of the assembly of the hearing-aid device; 
         FIG. 8  is a plan view of an eighth embodiment of the assembly of the hearing-aid device; 
         FIG. 9  is a plan view of a ninth embodiment of the assembly of the hearing-aid device; and 
         FIG. 10  is a plan view of a tenth embodiment of the assembly of the hearing-aid device. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring now in detail to the figures of the drawings, in which parts that correspond to one another have been provided with the same reference signs, and first, particularly, to  FIG. 1  thereof, there is seen a hearing-aid device  2  which is described below in exemplary fashion, is configured as a so-called BTE hearing-aid device and is preferably in the form of a conventional hearing aid. In this context, the hearing-aid device  2  includes a BTE housing  4 , which is configured to be worn behind an ear of a user. At least a microphone, not illustrated explicitly, for generating electrical input signals on the basis of captured acoustic input signals, and a loudspeaker  6  for generating acoustic output signals, are disposed in this BTE housing  4 . 
     Further, a signal processing apparatus  8  for processing the electrical input signals is positioned in the BTE housing  4 . In this case, the signal processing apparatus  8  is electrically conductively connected to the loudspeaker  6  through a conductor connection  10  and the signal processing apparatus  8  is configured to process the electrical input signals from the at least one microphone and to generate electrical output signals on the basis of the electrical input signals. These electrical output signals are then supplied to the loudspeaker  6  through the conductor connection  10  and are converted into the acoustic output signals at the loudspeaker. In this context, the loudspeaker  6  and the conductor connection  10  are part of a loudspeaker unit. Then, the hearing-aid device  2  and in particular the signal processing apparatus  8  are furthermore configured so that a type of amplifier function is realized during the operation, through the use of which the acoustic input signals or at least parts of the acoustic input signals are amplified and output as the acoustic output signals. 
     Moreover, the hearing-aid device  2  includes a transmission and reception unit  12  with a coupling element  14 , which is likewise disposed in the BTE housing  4 . In this case, the transmission and reception unit  12  serves for wireless communication with other electronic devices, in particular with other hearing-aid devices (e.g., for forming a binaural hearing-aid device system or hearing-aid system), with remote controls, with programming devices or with cellular telephones. In this case, the wireless communication is typically implemented by using electromagnetic waves in the radiofrequency range of 500 kHz to 5 GHz and in particular in the frequency range from 500 MHz to 5 GHz, that is to say for example using Bluetooth technology at approximately 2.4 GHz. 
     The aforementioned conductor connection  10  to the loudspeaker  6  and the aforementioned coupling element  14  of the transmission and reception unit  12  further are part of an assembly which is schematically reproduced in various embodiment variants in the illustrations of  FIG. 1  to  FIG. 10 . In this case, in all embodiment variants, a coupling is formed between the coupling element  14  and the conductor connection  10 , that coupling facilitating a transfer of electrical energy or electrical power, and the latter also being implemented in transmission and reception operation of the transmitter and reception unit  12 . In this case, the coupling is formed as an inductive and/or capacitive coupling, by way of which the coupling element  14  and the conductor connection  10  are coupled over at least one galvanic isolation point. 
     A first embodiment variant of the aforementioned assembly is illustrated in  FIG. 1 . In this case, the signal processing apparatus  8  is formed in a manner not illustrated in any more detail on a printed circuit board  16 , in particular a flexible printed circuit board  16 , and the conductor connection  10  to the loudspeaker  6  is formed at least in part, that is to say in one section in particular, by a wire element DE, which is referred to as connection wire below. This connection wire electrically conductively connects the printed circuit board  16  to the loudspeaker  6  in this case. Moreover, the coupling element  14  of this embodiment variant is formed at least in part, that is to say in one section in particular, by a wire element DE which is referred to as coupling wire below. 
     In this case, the coupling wire is guided for example in an interstice between the loudspeaker  6  and a battery  18  or a rechargeable battery of the hearing-aid device  2  and extends away from the transmitter and reception unit  12  which is seated on the printed circuit board  16 . In the intermediate region between the loudspeaker  6  and the battery  18  or the rechargeable battery, a section of the connection wire and a section of the coupling wire now run substantially parallel to one another and, as a result thereof, a capacitive or at least predominantly capacitive coupling is formed over these wire sections of the wire elements DE. The corresponding region, specifically a coupling spatial region K, in which this coupling is provided, is marked by a frame with a dashed line. 
     Preferably, the sections in which the wire elements DE run in parallel have at least a length L that is greater than or equal to 2 mm, further preferably greater than or equal to 5 mm and in particular greater than or equal to 10 mm. Moreover preferably, these sections are disposed at a distance A from one another which is less than or equal to 5 mm, further preferably less than or equal to 2 mm and in particular less than or equal to 0.5 mm. 
     According to an advantageous development, the two wire elements DE, that is to say firstly the coupling wire and secondly the connection wire, are formed by enameled wires which are preferably interconnected and for example adhesively bonded to one another over the sections running in parallel, in such a way that this fixes the specified parallel extent and the specified distance. 
     Two further embodiment variants of the aforementioned assembly are indicated in  FIG. 2  and  FIG. 3 . Here, in each case, a first frame R 1  shown on the left-hand side using a bold dash-dotted line indicates elements of the hearing-aid device  2  that are realized on the printed circuit board  16 , and a second frame R 2  shown on the right-hand side using a dash-dotted line not in bold indicates elements of the hearing-aid device  2  which are realized away from the printed circuit board  16 . 
     In the embodiment variant according to  FIG. 2 , the coupling element  14  is formed in full on the printed circuit board  16 , to be precise by a conductor track LB on the printed circuit board  16 , which is also referred to as a coupling track below. By contrast, the conductor connection  10  is partly formed on the printed circuit board  16  and partly formed by a wire element DE which connects the printed circuit board  16  to the loudspeaker  6 . The part of the conductor connection  10  formed on the printed circuit board  16  is formed by a conductor track LB, which is also referred to as connection track below. Now, in this embodiment variant, the coupling between the conductor connection  10  and the coupling element  14  is realized in a region on the printed circuit board  16  where the connection track and the coupling track extend in parallel in at least one section. The corresponding region, specifically the coupling spatial region K, in which this coupling is provided, is once again marked by a frame with a dashed line. 
     In this case too, the sections in which the conductor tracks LB extend in parallel have at least a length L of greater than or equal to 2 mm, further preferably greater than or equal to 5 mm and in particular greater than or equal to 10 mm. Moreover preferably, these sections are disposed at a distance A from one another which is less than or equal to 5 mm, further preferably less than or equal to 2 mm and in particular less than or equal to 0.5 mm. 
       FIG. 3  illustrates a modification of the embodiment variant according to  FIG. 2 . In this case, the coupling is not embodied as a capacitive or predominantly capacitive coupling but as an inductive or at least predominantly inductive coupling. To this end, the coupling track and the conductor track each form a conductor loop LS. The corresponding region, specifically the coupling spatial region K, in which this coupling is provided, is also marked by a frame with a dashed line herein. Alternatively, a comparable inductive or at least predominantly inductive coupling can also be realized away from the printed circuit board  16 , in a manner analogous to the capacitive or at least predominantly capacitive coupling according to  FIG. 1 . In this example, wire elements DE for example form the conductor loops LS. 
     Independently of the precise configuration of the coupling, the coupling element  14  and the conductor connection  10  are coupled over at least one galvanic isolation point. In this case, further, not only is no galvanic connection formed at the at least one galvanic isolation point of the coupling, but no galvanic connection is formed anywhere between the coupling element  14  and the conductor connection  10 . Nevertheless, the at least one galvanic isolation point of the coupling is usually not formed over the entire extent of the coupling element  14  and/or the entire extent of the conductor connection  10 , but in a restricted spatial region. It is only in this spatial region, specifically the aforementioned coupling spatial region K, that the coupling is effective or at least significantly effective at least in the transmission and reception operation. Expediently, this spatial region is structurally specified by the construction of the coupling, that is to say in particular also by virtue of whether the coupling is formed as an inductive and/or as a capacitive coupling. 
     In order to clarify these circumstances,  FIG. 4  shows a capacitive or at least predominantly capacitive coupling. In this case, the coupling element  14  and the conductor connection  10  each form an electrode element EE, with the electrode elements EE being disposed substantially parallel to one another. In this context, the sections of the coupling element  14  and the conductor connection  10  which extend substantially parallel to one another and in which the coupling is effective, that is to say the sections in the marked coupling spatial region K, are understood to be electrode elements EE. Preferably, these sections, which for example are formed by the above-described wire elements DE according to  FIG. 1  or the above-described conductor tracks LB according to  FIG. 2 , have at least a length L of greater than or equal to 2 mm, further preferably greater than or equal to 5 mm and in particular greater than or equal to 10 mm. Moreover preferably, these sections are disposed at a distance A from one another which is less than or equal to 5 mm, further preferably less than or equal to 2 mm and in particular less than or equal to 0.5 mm. 
     A spatially close arrangement of the electrode elements EE is typical in the case of the above-described coupling by using electrode elements EE. That is to say, the coupling element  14  and the conductor connection  10  in this case are disposed in relation to one another at least in one section at a distance A that is made concrete in advance. Particularly in cases where such a spatial proximity is not realizable and/or not desirable, embodiment variants in which a capacitor  20  is disposed between the coupling element  14  and the conductor connection  10  are expedient, like in the exemplary embodiment according to  FIG. 5 , and/or in which a bridge element  22  is disposed between the coupling element  14  and the conductor connection  10 , like in the exemplary embodiments according to  FIG. 6  to  FIG. 10 . 
     In the exemplary embodiments according to  FIG. 6  to  FIG. 10 , the coupling is formed as an indirect coupling, wherein the coupling element  14  is coupled indirectly to the conductor connection  10  through the bridge element  22 . This bridge element  22  expediently is an additional component or an additional assembly. 
     Depending on the application, embodiments of the hearing-aid device  2  with a bridge element  22  in which the coupling element  14  and/or the conductor connection  10  is galvanically connected to the bridge element  22 , specifically in particular in such a way that the bridge element  22  is formed as a type of branch which branches from the coupling element  14  or from the conductor connection  10 , are advantageous. A corresponding galvanic connection between the coupling element  14  and the bridge element  22  or between the conductor connection  10  and the bridge element  22  has, depending on the embodiment variant, at least one resistor and/or a solder connection, a welded connection, an adhesive connection or a crimped connection. 
     Now, such a galvanic connection is formed between the conductor connection  10  and the bridge element  22  in the exemplary embodiment according to  FIG. 6 . In this case, the bridge element  22  is identifiable as an additional component or an additional assembly, for example by virtue of the conductor connection  10  being formed by a conductor track LB and the bridge element  22  being formed by a wire element DE, or for example by virtue of the conductor connection  10  and the bridge element  22  being formed by different wire elements DE. Moreover, a coupling by using the above-described electrode elements EE is formed between the bridge element  22  and the coupling element  14 . 
     In an alternative embodiment variant which is not shown, the roles of the coupling element  14  and the conductor connector  10  are interchanged as it were. Then, in that case, such a galvanic connection is formed between the coupling element  14  and the bridge element  22  and a coupling by using the above-described electrode elements EE is formed between the bridge element  22  and the conductor connection  10 . 
     Furthermore, configurations are advantageous in which at least two galvanic isolation points of the coupling or two coupling points are formed between the coupling element  14  and the conductor connection  10 , those galvanic isolation points or coupling points being spatially separated from one another by the bridge element  22  and being connected in series as it were. The coupling between the coupling element  14  and the conductor connection  10  in these cases is formed of two partial couplings, specifically a first partial coupling over one of the at least two galvanic isolation points of the coupling and a second partial coupling over the other of the at least two galvanic isolation points of the coupling. 
       FIG. 7  shows such a coupling through two coupling points. The first coupling point and the first partial coupling are formed in this case between the conductor connection  10  and the bridge element  22 , and the second coupling point and the second partial coupling are formed between the coupling element  14  and the bridge element  22 . In the exemplary embodiment according to  FIG. 7 , the first partial coupling is formed by using a capacitor  20  and the second partial coupling is formed by using the above-described electrode elements EE. 
     In an alternative embodiment variant which is not shown, the roles of the coupling element  14  and the conductor connection  10  are once again interchanged as it were. In accordance with a further embodiment variant, which is not shown, the two partial couplings are each formed by using a capacitor  20  and, in the embodiment variant according to  FIG. 8 , both partial couplings are each formed by using the above-described electrode elements EE. 
     In accordance with further embodiment variants, which are not shown, one of the two partial couplings is formed as an inductive or at least predominantly inductive coupling and the other partial coupling is formed as a capacitive or predominantly capacitive coupling in such a way that then, overall, the coupling between the coupling element  14  and the conductor connection  10  is both inductive and capacitive. In this case, the partial couplings are constructed in the manner of the above-described partial couplings or the above-described couplings. 
     In  FIG. 9 , the coupling between the bridge element  22  and the coupling element  14  is formed as an inductive or at least predominantly inductive coupling. A galvanic connection configured as a branch is moreover formed between the conductor connection  10  and the bridge element  22 . 
     Further, embodiments in which the bridge element  22  has a first bridge part  24  and a second bridge part  26 , as indicated in  FIG. 10 , are expedient. In that case, then, the at least one galvanic isolation point of the coupling in particular is formed between the first bridge part  24  and the second bridge part  26 . In  FIG. 10 , the first bridge part  24  and the second bridge part  26  are inductively or at least predominantly inductively coupled in exemplary fashion. 
     The frames with the solid line between the conductor connection  10  and the first bridge part  24  and between the second bridge part  26  and the coupling element  14 , shown in  FIG. 10 , represent placeholders PH 1 , PH 2 . Each placeholder PH 1 , PH 2  represents a partial coupling according to an above-described type or a galvanic connection of an above-described type in any combination. Hence, for example, a galvanic connection formed as a branch and/or formed by way of a resistor then is formed between the conductor connection  10  and the first bridge part  24  and a capacitive or predominantly capacitive coupling by using the aforementioned electrode elements EE is formed between the second bridge part  26  and the coupling element  14 . 
     The following is a summary list of reference numerals and the corresponding structure used in the above description of the invention. 
     LIST OF REFERENCE SIGNS 
     
         
           2  Hearing-aid device 
           4  BTE housing 
           6  Loudspeaker 
           8  Signal processing apparatus 
           10  Conductor connection 
           12  Transmitter and reception unit 
           14  Coupling element 
           16  Printed circuit board 
           18  Battery 
           20  Capacitor 
           22  Bridge element 
           24  First bridge part 
           26  Second bridge part 
         DE Wire element 
         LB Conductor track 
         LS Conductor loop 
         EE Electrode element 
         K Coupling spatial region 
         R 1  First frame 
         R 2  Second frame 
         L Length 
         A Distance 
         PH 1  Placeholder  1   
         PH 2  Placeholder  2