Implantable hearing system with audiometer

• US 6,788,790 B1
• Filed: 08/06/1999
• Issued: 09/07/2004
• Est. Priority Date: 04/01/1999
• Status: Expired due to Term

• Current Assignee: Cochlear Limited
• Original Assignee: Cochlear Limited
• Inventors: Leysieffer, Hans
• Primary Examiner(s): Harvey, Minsun Oh
• Assistant Examiner(s): PENDLETON, BRIAN T
• Application Number:
  US09/369,180
• Time in Patent Office: 1,859 Days
• Field of Search: 600/25, 600/559, 607/57, 607/55, 607/56, 381/314, 381/60
• US Class Current: 381/60
• CPC Class Codes: H04R 25/505 using digital signal processing
• CPC Class Codes: H04R 25/606 acting directly on the eardrum, the ossicles or the skull, e.g. mastoid, tooth, maxillary or mandibular bone, or mechanically stimulating the cochlea, e.g. at the oval window

Abstract

Partially and fully implantable hearing system for rehabilitation of a pure sensorineural hearing loss or combined conduction and inner ear impairment, with a microphone (10) which delivers an audio signal, an electronic signal processing and amplification unit (40, 50, 80, 140, 141) which is located in an audio signal processing electronic hearing system path, an implantable electromechanical output transducer (20) and a unit (60) for power supply of the implant, an electronic module (90, 140, 141) being added to the hearing system and generating the audiometry signals for an audiologic study and evaluation of the coupling quality of the electromechanical output transducer (20) and feeding it into the audio signal processing path of the hearing implant.

Claims

1. An at least partially implantable hearing system for rehabilitation of a pure inner ear hearing disorder or combined sound conduction and inner ear hearing disorder, with a microphone which delivers an audio signal, an electronic signal processing and amplification unit which is located in an audio signal processing electronic hearing system path, an implantable electromechanical output converter and a unit for supplying power to the system and an electronic module which generates audiometry signals for an audiologic, subjective study and evaluation of the coupling quality of the electromechanical output converter and feeds it into the audio signal processing path,

wherein the electronic signal processing and amplification unit has an audiological signal processing stage comprising a signal processor, which processes the audio signal and also generates the audiometry signals and combines the audiometry signals with the audio signal.

2. Hearing system as claimed in claim 1, further comprising means for adapting patient-specific signal parameters for the audiometry function to the individual requirements of the patient by means of an electronic unit.

3. Hearing system as claimed in claim 1, wherein the electronic signal processing and amplification unit has an amplifier downstream of the microphone, the audiologic signal processing stage supplied with an output signal of the amplifier and a driver amplifier upstream of the electromechanical output converter.

4. Hearing system as claimed in claim 3, wherein the electronic module has a signal generator arrangement for generating the signals necessary for the audiometry function and a summing element connected between the signal processing stage and the driver amplifier, via which both the output signal of the audiologic signal processing stage and also the output signal of the signal generator arrangement pass to the driver amplifier.

5. Hearing system as claimed in claim 3, wherein the signal processor is a dugital signal processor.

6. Hearing system as claimed in claim 5, wherein an analog to digital converter is connected upstream of the signal processor and a digital to analog converter is connected downstream of the signal processor.

7. Hearing system as claimed in claim 6, wherein the digital to analog converter and the driver amplifier are combined in one module.

8. Hearing system as claimed in claim 5, wherein the signal processor has a data storage for storing at least one of patient-specific, audiologic adaptation parameters and parameters for generating the audiometry signals.

9. Hearing system as claimed in claim 1, wherein at least part of signal processing by the electronic signal processing and amplification unit and signal generating by the electronic module is controlled by a microcontroller.

10. Hearing system as claimed in claim 9, wherein the microcontroller has a data store for storing at least one of patient-specific, audiologic adaptation parameters and operating parameters of the electronic module.

11. Hearing system as claimed in claim 5, wherein the signal processor controls at least part of the signal processing by the electronic signal processing and amplification unit and signal generating by the electronic module.

12. Hearing system as claimed in claim 10, wherein for data input into the data store there is a telemetry unit.

13. Hearing system as claimed in claim 12, characterized by an external programming system which communicates with the telemetry unit.

14. Hearing system as claimed in claim 12, wherein the system is made fully implantable by the signal processing and amplification unit and the electronic module being housed together with the power supply unit in a hermetically sealed and biocompatible implant housing.

15. Hearing system as claimed in claim 14, wherein the electronic module is connected via an implant line to a microphone which is of a size and shape adapted for being implanted subcutaneously in the rear wall of the auditory passage.

16. Hearing system as claimed in claim 14, wherein the electronic module is connected via an implantable line to the electromechanical output converter.

17. Hearing system as claimed in claim 1, wherein a coupling element is provided for coupling the output converter to an ossicle of the middle ear chain for transmission of output-side mechanical converter vibrations.

18. Hearing system as claimed in claim 1, wherein the output converter is coupleable, via an air gap, to one of the ossicle chain and the inner ear.

19. characterized Hearing system as claimed in claim 18, characterized by an external system for transcutaneous transfer of patient-specific hearing system and audiometry programming data to the implant-side telemetry unit.

20. Hearing system as claimed in claim 19, wherein the power supply unit comprises a secondary, rechargeable element, and wherein the telemetry unit is additionally a power receiving circuit for recharging the power supply unit, and wherein the external system comprises a charger.

21. Hearing system as claimed in claim 20, characterized by a portable remote control unit for setting functions of the hearing system.

22. Hearing system as claimed in claim 1, wherein the system is partially implantable, an implantable part having the output converter, a power and signal receiving interface and an electronic system connected between the receiving interface and the output transducer with components necessary for power supply and data regeneration, and an external system part comprising the microphone, an electronic unit with the signal processing and amplification unit and the electronic module, a driver unit, and a power and signal transmitting interface connected to an output of the driver unit.

23. Hearing system as claimed in claim 22, characterized by an external system transferring patient-specific hearing aid and audiometry programming data to the electronic unit of the external system.