# Patent

## Title
Hearing prosthesis system having interchangeable housings

## Abstract

There is disclosed a hearing prosthesis comprising a first housing (11) containing a primary signal processor that receives signals output by a microphone; and a second housing (13) removably connectable to the first housing (11); wherein a user interface (14) is provided on the second housing (13) that provides control of one or more features of the operation of the primary signal processor.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application claims priority from Provisional Patent Application No. 2003907101 filed on 22 Dec. 2003, the content of which is incorporated herein by reference.
TECHNICAL FIELD
The present invention relates to hearing prostheses and in particular, to external, wearable components of hearing prostheses.
BACKGROUND
A cochlear implant hearing prosthesis (also referred to as a cochlear prosthesis, and the like, collectively and generally referred to herein as “cochlear implant”) delivers electrical stimulation to the auditory nerve fibres thereby allowing the brain to perceive a hearing sensation resembling the natural hearing sensation normally delivered by the auditory nerve.
As shown in prior art drawing FIG. 5, a cochlear implant hearing prosthesis typically comprises an external assembly of components 51 and an implantable assembly of components 52.
The external assembly 51 includes a primary signal processor unit in the form of a speech processor unit 56, a transmission coil 57 and a microphone unit 58. The primary signal processor unit includes an internal power source, such as a number of batteries, and is connected to each of the transmission coil 57 and microphone unit 58 via cables 59.
The internal assembly 52 typically includes a receiver antenna 55, a receiver/stimulator unit 53, and an intracochlear electrode assembly 54.
In operation, the microphone 58 detects sounds, such as speech and environmental sounds and converts these into an electrical signal. The electrical signal is then encoded by the speech processing electronics in the primary signal processor unit 56. The encoded output signal is transcutaneously transmitted to the internal assembly 52 via a radio frequency (RF) link.
In recent times, the speech processor unit and the microphone unit have been combined to form a single unit that is worn behind the ear. This is referred to as a behind the ear (BTE) speech processor unit.
Referring to prior art drawing FIG. 6, the BIB speech processor unit 61 is normally manufactured by mould a main body and an inter-engageable battery carrier. This arrangement enables the batteries 62 to be readily replaced.
The BTE speech processor unit 61 is relatively expensive and must undergo an optimisation procedure following implantation of the implantable assembly 52. While the operability of the signal processing aspects of the BTE speech processor unit can be varied by clinical software during the optimisation procedure, usually in a clincian's practice, other aspects of operability are far more limited. This is particularly the case with external user inter-actable features.
It is desired to provide an arrangement that improves upon earlier proposals, or at least provides a useful alternative.
SUMMARY
According to a first aspect, the present invention is a hearing prosthesis system comprising:
a first housing containing a primary signal processing unit that receives signals output by a microphone; and
a plurality of second housings that are removably connectable to the first housing;
wherein only one of said second housings is connectable to said first housing at any one time and further wherein at least one of said second housings has a user interface that provides control of one or more features of the operation of the primary signal processor.
According to a second aspect the present invention is a hearing prosthesis comprising:
a first housing containing a primary signal processor that receives signals output by a microphone; and
a second housing removably connectable to the first housing,
wherein a user interface is provided on the second housing that provides control of one or more features of the operation of the primary signal processor.
According to a third aspect, the present invention is a hearing prosthesis comprising:
a first housing containing a primary signal processor that receives sirs output by a microphone; and
a remote module;
wherein a user interface is provided on the remote module that provides control of one or more features of the operation of the primary signal processor.
According to another aspect, the present invention is a speech processing unit for a hearing pros thesis rte speech processing unit comprising:
a main part configured for wearing behind an ear of the hearing prosthesis recipient, the main part including a primary signal processor for carrying out primary signal processing functions associated with the speech processing unit; and
a replaceable part being removably connectable with the pry part, the replaceable part including a user interface for communication with the primary signal processor.
According to another aspect, the present invention is a speech processing unit for a codhlear implant recipient, the speech processing unit comprising:
a main part configured for wearing behind an ear of the cochlear implant recipient, the main part including a primary signal processor for out primary signal processing functions associated with the speech processing unit; and
a replaceable part being removably connectable with the primary par, the replaceable part including a battery compartment and user interface for communication with the primary signal processor.



BRIEF DESCRIPTION OF THE DRAWINGS
By way of example only, preferred embodiments of the invention are described with reference to the accompanying drawings, in which:
FIG. 1 is a side elevation view of an ex component of a hearing prosthesis according to the present disclosure;
FIG. 2 is a side elevation view of another external component of a hearing prosthesis according to the present disclosure;
FIG. 3 is a view of another external component of a hearing prosthesis according to the present disclosure;
FIG. 4 is a schematic view of a hearing prosthesis system according to the present disclosure;
FIG. 5 is an example of a prior art extend assembly; and
FIG. 6 is another example of a prior art external assembly.



DETAILED DESCRIPTION AND BEST MODE
Referring to FIG. 1, a BTE speech processor unit 10 includes a first housing 11 (or a main part), an ear hook 12 and a second housing 13 (or replaceable part). The first and/or second housing can be formed of a metallic material a ceramic material a polymeric material, or some combination thereof.
The BTE speech processor unit 10 is connected to a headpiece 37 via cable 36 which extends from the first housing 11.
The first housing 11 includes a signal processing electronics for operating the BTE speech processor unit 10. In this example, a microphone 11a is mounted on the first housing 11. However, the microphone can be positioned elsewhere, such as on the headpiece 37, on the second housing 13, or on the clothing of the recipient.
The headpiece 37 comprises an antenna coil 38 that is capable of transmitting signals to a complementary antenna implanted within the recipient in addition, the antenna coil 38 is capable of receiving signals transmitted from the implanted antenna. The antenna coil 38 surrounds a magnet 39 that is attracted to a complementary magnet implanted within the recipient. The magnetic attraction serves to retain the antenna coil 38, during use, in the desired position on the head of the recipient.
The BTE speech processor unit 10 further comprises a second housing 13 that is removably connectable to the it housing 11. It is envisaged that the second housing 13 is normally replaceable by the recipient.
The second housing 13 includes a user interface panel 14 bang two push buttons 15, 16 and a dial 17. Push button 15 is used to activate and deactivate the speech processor within the first housing 11 and is also used to select the speech processor program being performed by the speech processor. The dial 17 allows adjustment of the volume and sensitivity of the speech processor while the push button 16 allows the recipient or their carer to select whether the input to the speech processor is provided by the microphone, a telecoil or a mire of inputs. The user interface panel 14 is either removably or non-removably mounted to the second housing 13.
The present inventors have realised that providing for replaceability or interchangeability of the user interface can provide significant recipient benefits, compared with the manufacturing costs and total purchasing costs for an external component assembly of a hearing prosthesis. For example, it may be desired to provide larger push buttons for the elderly while children and infants may require more simplified interlockable controls. Similarly, an experienced user may require a more complex interface and/or greater flexibility with the internal workings of the speech processor.
Another advantage includes that the recipient can choose the user interface that suits them and/or their lifestyle. They also have the option of being able to delay a final decision as to which user interface they wish to use until after the purchase of the speech processor unit. If desired, they also have the option of changing the user interface of their system without the need to purchase a new speech processor unit.
The system also has advantage a the user is able to upgrade their user interface if and when desired. An upgrade may be made because a new type of user interface has been made available and/or because the user interface has failed and so needs to be replaced. The user interface being actuable is vulnerable to damage and this ability to be able to replace the user interface without having necessarily to replace the speech processor unit is an advantage of the present system.
A further advantage of the BTE speech processor unit is that the parts which are most vulnerable to damage and/or that are less expensive can be easily replaced.
Turning now to FIG. 2, there is depicted a BTE speech processing unit 20 having an alternative user interface panel 24. As with the user interface panel described in relation to FIG. 1, the interface panel 24 of FIG. 2 can be removably or non-removably mounted to the second housing 23.
The user interface panel 24 includes two tactile position controls 25, 26 that, through their position provide feedback to the recipient and/or their carer as to the setting of that control. Both tactile position controls 25, 26 comprise a switch that is movable between at least three settings. Switch 25 is a three-position switch that allows a recipient and/or their carer to select which speech program is to be used. Dial 27 allows adjustment of the volume and sensitivity of the speech processor. Switch 26 allows a recipient and/or their carer to set whether the speech processor is receiving input from the microphone, a telecoil, or a mix of such inputs. The switch 26 also allows the recipient and/or their carer to adjust the operation of the speech processor such that it cm detect relatively softer sounds, such as whisper.
In FIG. 2, the user interface 24 is enclosed within a resiliently flexible cover 28. The cover 28 protects the user interface 24 but also allows more precise control of the user interface 24 by the recipient and/or their carer.
In the arrangements shown in FIGS. 1 and 2, the first housing 11 for the speech processor is provided without a user interface. Therefore, any modification of its performance must be performed through the user interface on the second housing (13 or 23).
As shown in FIGS. 1 and 2, more than one type of second housing can be removably mountable to the first housing 11. The various types of second housing can vary in the type of user interface panel that is provided thereon. This allows a recipient and/or their carer to customise the hearing prosthesis by selecting the user interface to be used with their hearing prosthesis at any one time.
The first housing containing the speech processor unit can be connectable to more than one type of power supply. In the examples of FIGS. 1 and 2, the second housing (13 or 23) contains a power supply for powering the componentry of the prosthesis. On mounting of the second housing (13 or 23) to the first housing (11), the power supply is able to provide power trough an electrical connection to the speech processor. Preferably, the power supply within the second housing comprises one or more rechargeable batteries.
Referring now to FIG. 3, there is shown the fit housing 11 and an ear hook 12 as earlier described in relation to FIG. 1. However in comparison with the arrangement described in relation to FIG. 1, the second housing 13 is replaced by assembly 300. Assembly 300 includes a connector unit 31a and a remote module 32, connected via cable 33.
The first housing 11 relies on cable 33 to provide data and power transfer between the remote module 32 and a connector nit 31a that is removably connectable with the speech processor 31. However, it will be appreciated that wireless transmission can be utilised to transfer data and control signals between the remote module 32 and the speech processor and/or vice versa.
The remote module 32 includes a user interface panel 34, which is optionally removable/replaceable from the connector unit 31a. In the case of a removable replaceable interface panel 34, this allows a recipient and/or their carer to further customise the hearing prosthesis by selecting the user interface to be used with their hearing prosthesis at any one time.
The user interface panel 34 includes two push-button switches and a dial similar to that of user interface panel 14 earlier described in relation to FIG. 1.
In the example shown in FIG. 3, the remote module 32 also houses a power supply for at least some of the componentry of the external component 30 and particularly the speech processor. Preferably, the power supply comprises two rechargeable batteries 35.
The remote module 32 can be worn on the body of the recipient such as by being clipped to or placed in the pocket of clothing of the recipient.
A system of interchangeable parts will now be described with reference to FIG. 4.
The first housing 11 can be provided as part of a hearing prosthesis system 40 which can provide several interchangeable configurations. Hence the recipient or their carer is provided with a number of options as to what may be connected to the speech processor 31 housing at any one time.
The system 40 includes an option to connect a second housing 41 that includes a power supply 42 and radio frequency (RF) signal receiver circuitry that receives and processes RF signals output by the remote module 32. In this arrangement, the remote module 32 incorporates RF signal transmission circuitry for transiting signal to the housing 41 in response to adjustments made to the user interface 34 on the remote module 32.
The system 40 can also include an option to connect a second housing 43 that includes a power supply, a visual display device 44 and user interface 45. The exemplary display device 44 is a liquid crystal display, however, other suitable displays are envisaged. The liquid crystal display 44 provides feedback to the recipient or their carer as to the performance of the system 40.
The system 40 can also include an option to connect a second housing 46 that includes a power supply and circuitry that not only receives and processes RF signals but also can transmit signals back to a remote module 47. In this case, the remote module 47 as well as housing a power source has a user interface 48 and a liquid crystal display (LCD) 49 for providing feedback to the recipient or their carer as to the performance of the system 40.
Optionally, the first housing user interface can control some or all of the same features that are controllable by the user interface on the second housing 23 and/or the remote module 32. The first housing user interface, if present, can be rendered partially or fully inoperable when a second housing 23 and/or remote module 32 as defined herein is used in conjunction with the first housing of the hearing prosthesis. The first housing user interface can be removably or non-removably mounted to the first housing.
The user interface of the second housing 23 and/or the remote module 32 can be selected from a range of types of user interfaces that are available for use by the recipient of the hearing prosthesis or the recipients carer. For example, the user interface of the second hot 23 can be the same or different from available on a remote module 32. Where a user interface is provided on the first housing, the user interface of the second housing and/or the remote module can be different from that provided on the first housing.
In alternative configurations, one form of a user interface can be provided on the first housing 11 to control different features of the hearing prosthesis than that of the features controlled by the user interface panel of the second housing 23 and/or the remote module 32.
It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiments without departing from the scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.
Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
It will be appreciated by persons skilled in the art that numerous variations and/or modifications may be made to the invention as shown in the specific embodiment without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.

## Claims

1. A hearing prosthesis system comprising:
a first housing containing a primary signal processor configured to receive signals output by a microphone; and
a plurality of second housings, each configured to removably connect to the first housing, wherein each of said second housings has a different mechanism configured to allow user control of one or more features of the operation of the primary signal processor.

2. The hearing prosthesis system of claim 1, wherein the mechanism of one of said second housings comprises a user interface disposed on the one of the second housings, wherein the user interface comprises mechanical controls.

3. The hearing prosthesis system of claim 2, wherein the user interface comprises at least one mechanical control.

4. The hearing prosthesis system of claim 3, wherein the user interface comprises at least one of a push button, a switch and a rotary control.

5. The hearing prosthesis system of claim 3, wherein the user interface comprises a three-position switch.

6. The hearing prosthesis system of claim 1, further comprising:
a remote module comprising a user interface, wherein one of said second housings is part of a connector unit configured to communicate, via an electrically conducting lead, with the remote module, and wherein said mechanism of said one of said second housings is configured to allow user control of the one or more features of the operation of the primary signal processor with the remote module.

7. The hearing prosthesis system of claim 6 wherein the remote module has a visual display.

8. The hearing prosthesis system of claim 1, wherein said remote module comprises a user interface.

9. The hearing prosthesis system of claim 1, further comprising:
a remote module comprising a user interface, wherein said mechanism of one of said second housings comprises signal receiver circuitry configured to wirelessly receive signals from said remote module.

10. The hearing prosthesis system of claim 9 wherein the remote module houses signal transmission circuitry configured to provide radio frequency signals to the second housing in response to adjustments made to the user interface.

11. The hearing prosthesis system of claim 1, wherein the second housing contains a power source.

12. The hearing prosthesis system of claim 1, further comprising:
a remote module comprising a user interface, wherein said mechanism of one of said second housings comprises a signal transceiver configured to wirelessly receive and wirelessly send signals from and to said remote module.

13. The hearing prosthesis system of claim 1, wherein, when the first housing is removably connected to any one of the second housings, the connected first and second housings are configured to be worn on the ear of the recipient.

14. The hearing prosthesis system of claim 1, wherein the hearing prosthesis system is a cochlear implant system.

15. The hearing prosthesis system of claim 1, wherein the mechanism of one of said second housings comprises a user interface disposed on the one of the second housings, wherein the user interface comprises mechanical controls and a visual display.

16. A hearing prosthesis comprising:
a first housing containing a primary signal processor configured to receive signals output by a microphone; and
a plurality of second housings each having a different mechanism configured to allow user control of one or more features of the operation of the primary signal processor,
wherein the mechanism of at least one housing is a user interface, and
wherein the first housing is configured to removably connect to at least two of the plurality of second housings.

17. The hearing prosthesis of claim 16 wherein at least one of the second housings contains a power supply.

18. The hearing prosthesis of claim 16, wherein the mechanism of one of the second housings comprises signal receiver circuitry configured to wirelessly receive signals from a remote module comprising a user interface.

19. The hearing prosthesis of claim 18, wherein the first housing comprises a user interface, and wherein the hearing prosthesis is configured to render the user interface partially or fully inoperable.

20. The hearing prosthesis of claim 19, wherein the user interface is removably mounted to the first housing.

21. The hearing prosthesis of claim 16, wherein the hearing prosthesis is a cochlear implant.

22. The hearing prosthesis of claim 16, wherein the mechanism of one of the second housings comprises a user interface disposed on the one of the second housings, wherein the user interface comprises mechanical controls.

23. The hearing prosthesis of claim 16, wherein the mechanism of one of the second housings comprises a user interface disposed on the one of the second housings, wherein the user interface comprises mechanical controls and a visual display.

24. The hearing prosthesis of claim 16, wherein the mechanism of one of the second housings is configured to allow user control of the one or more features of the operation of the primary signal processor with a remote module configured to communicate with the one of the second housings via an electrically conducting lead.

25. The hearing prosthesis of claim 16, wherein the mechanism of one of the second housings comprises a signal transceiver configured to wirelessly receive and wirelessly send signals from and to a remote module comprising a user interface.

26. A hearing prosthesis comprising:
a first housing containing a primary signal processor configured to receive signals output by a microphone; and
a plurality of second housings each having a different mechanism configured to allow user control of one or more features of the operation of the primary signal processor,
wherein the first housing is configured to removably connect to each of the second housings, and
wherein a first one of the mechanisms is configured to enable a remote module to communicate with the primary signal processor.

27. The hearing prosthesis of claim 26, wherein a second one of the mechanisms comprises a user interface disposed on the one of the second housings, wherein the user interface comprises mechanical controls.

28. The hearing prosthesis of claim 26, wherein a second one of the mechanisms comprises a user interface disposed on the one of the second housings, wherein the user interface comprises mechanical controls and a visual display.

29. The hearing prosthesis of claim 26, wherein the remote module is configured to communicate with the first one of the second housings via an electrically conducting lead.

30. The hearing prosthesis of claim 26, wherein the first one of the mechanisms comprises signal receiver circuitry configured to wirelessly receive signals from the remote module comprising a user interface.

31. The hearing prosthesis of claim 26, wherein the first one of the mechanisms comprises a signal transceiver configured to wirelessly receive and wirelessly send signals from and to the remote module.

32. A speech processing unit of a hearing prosthesis, the speech processing unit comprising:
a first component comprising a signal processor configured to perform signal processing functions, wherein the first component is configured to be worn behind an ear of a recipient; and
a plurality of second components each having a different mechanism configured to allow user control of one or more operations of the signal processor,
wherein the first component configured to removably connect to any one of the plurality of second components.

33. The speech processing unit of claim 32, wherein the mechanism of one of the second components comprises a user interface disposed on the one of the second components, wherein the user interface comprises mechanical controls.

34. The speech processing unit of claim 32, wherein the mechanism of one of the second components comprises a user interface disposed on the one of the second components, wherein the user interface comprises mechanical controls and a visual display.

35. The speech processing unit of claim 32, wherein the mechanism of one of the second components is configured to allow user control of the one or more features of the operation of the primary signal processor with a remote module configured to communicate with the one of the second housings via an electrically conducting lead.

36. The speech processing unit of claim 32, wherein the mechanism of one of the second components comprises signal receiver circuitry configured to wirelessly receive signals from a remote module comprising a user interface.

37. The speech processing unit of claim 32, wherein the mechanism of one of the second components comprises a signal transceiver configured to wirelessly receive and wirelessly send signals from and to a remote module comprising a user interface.

38. A hearing prosthesis system comprising:
a first component including a signal processor configured to perform signal processing functions;
a remote module; and
a plurality of second components, each configured to removably connect to the first component, wherein each of the second components has a different mechanism configured to allow user control of one or more features of the operation of the signal processor, wherein a first one of the mechanisms comprises a user interface disposed on one of the second components and a second one of the mechanisms comprises circuitry configured to receive signals from the remote module.

39. The speech processing unit of claim 38, wherein the user interface comprises mechanical controls.

40. The speech processing unit of claim 39, wherein the user interface comprises a visual display.

41. The speech processing unit of claim 38, wherein the remote module is configured to communicate with the second one of the second components via an electrically conducting lead.

42. The hearing prosthesis system of claim 38, wherein the circuitry of the second one of the mechanisms comprises signal receiver circuitry configured to wirelessly receive signals from the remote module.

43. The speech processing unit of claim 38, wherein the circuitry of the second one of the mechanisms comprises signal transceiver configured to wirelessly receive and wirelessly send signals from and to the remote module.