Intrabody communication for a hearing aid

• US 7,206,423 B1
• Filed: 05/10/2000
• Issued: 04/17/2007
• Est. Priority Date: 05/10/2000
• Status: Expired due to Fees

• Current Assignee: University of Illinois
• Original Assignee: Board of Trustees of The University of Illinois
• Inventors: Wheeler, Bruce C., Jones, Douglas, Lansing, Charissa R., Feng, Albert S., Bilger, Robert C., O'Brien, William D.
• Primary Examiner(s): Ni; Suhan
• Application Number:
  US09/568,435
• Time in Patent Office: 2,533 Days
• Field of Search: 381/326, 381/380, 381/328, 381/314, 381/313, 381/312, 381/315, 381/323, 381330-331, 687/57, 687/25, 455 40- 41, 455/95, 455/100, 455/106, 340/333, 379/55.1, 341/33
• US Class Current: 381/312
• CPC Class Codes: H04B 13/005 Transmission systems in which the medium consists of the human body
• CPC Class Codes: H04R 25/502 using analog signal processing

Abstract

Disclosed is a hearing aid that includes a first component operable to receive an input and a second component operable to provide an output to at least one ear of a user of the hearing aid. The first component and the second component are electrically coupled together by a closed electrical circuit including at least one electrical conduction pathway formed by skin of the user between the first component and the second component. An electrical signal is transmitted from the first component to the second component with the closed electrical circuit. Communication between the first and second components can be one-way or two-way.

Claims

1. A method, comprising:

operating a hearing aid including a first component and a second component, the first component including a first pair of conductors;

placing the first component and the second component in contact with a skin surface in a spaced apart relationship, the first pair of conductors each being electrically coupled to the skin surface by said placing;

generating an electric potential between the first pair of conductors to transmit a first electrical communication signal from the first component to the skin in contact with the first component; and

receiving the first electrical communication signal with the second component over an electrical transmission pathway along the skin between the first component and second component.

2. The method of claim 1, wherein the first pair of conductors are each capacitively coupled to the skin surface by a dielectric positioned therebetween.

3. The method of claim 1, further comprising disposing the second component in a passage of an ear of a user of the hearing aid and positioning the first component outside the ear.

4. The method of claim 3, wherein the second component is a cochlear implant.

5. The method of claim 3, wherein the first component includes a sensor to detect an acoustic excitation and one or more of the first component and the second component includes a signal processor.

6. The method of claim 4, wherein the second component includes a plurality of conductors electrically coupled to the skin of the user to receive the electric communication signal and further comprising transmitting a second electrical communication signal from the second component to the first component by electrical conduction through the portion of the skin between the first component and the second component.

7. The method of claim 1, wherein the electric communication signal is a modulated, time varying waveform.

8. The method of claim 1, wherein said placing includes mounting the first component to a first ear of a user and the second component to a second ear of the user.

9. A method, comprising:

operating a hearing aid including a first component and a second component, the first component including a first pair of electrodes and the second component including a second pair of electrodes;

electrically engaging the first pair of electrodes and the second pair of electrodes with skin; and

transmitting an electrical signal from the first component to the second component by electrical conduction along the skin between the first pair of electrodes and the second pair of electrodes during said engaging.

10. The method of claim 9, wherein said electrically engaging is performed by capacitively coupling the first pair of electrodes to the skin with a dielectric positioned therebetween.

11. The method of claim 9, wherein the first pair of electrodes and the second pair of electrodes establish an electrical conduction circuit including the skin.

12. The method of claim 9, wherein the hearing aid further includes a third component having a third pair of electrodes electrically engaged with the skin to communicate with at least one of the first component and the second component by electric conduction through the skin positioned therebetween, the third component including an acoustic sensor.

13. The method of claim 12, wherein the first component includes a signal processor and the second component includes an output device to stimulate hearing of a user of the hearing aid, and further comprising:

positioning the second component in a passageway of an ear of the user;

receiving an input signal from the third component corresponding to an acoustic excitation;

processing the input signal with the signal processor to generate the electrical signal; and

providing an output signal to the ear of the user with the output device.

14. The method of claim 9, wherein said electrically engaging includes positioning the first component relative to a first ear of a user and the second component relative to a second ear of the user.

15. A method, comprising:

providing a hearing aid including a first component and a second component, the first component including an acoustic sensor;

contacting skin with the first component and the second component; and

transmitting an electrical signal from the first component to the second component during said contacting by electrical conduction along a pathway formed by the skin between the first component and second component.

16. The method of claim 15, wherein the hearing aid comprises a third component including another acoustic sensor, the third component is spaced apart from the first component and the second component and is in communication with the second component by electrical conduction along the skin between the third component and the second component, and the first component and the third component are operable to provide a binaural input to the second component.

17. The method of claim 16, wherein the second component includes a signal processor to process the binaural input.

18. The method of claim 17, wherein the hearing aid further includes a fourth component positioned in a passage of an ear of a user of the hearing aid, the fourth component being in communication with the second component to provide an output signal to stimulate hearing perception of the user.

19. The method of claim 18, wherein the fourth component is a cochlear implant.

20. The method of claim 15, wherein said contacting including engaging a first ear of a user with the first component and a second ear of the user with the second component.

21. A system comprising:

a hearing aid to enhance hearing of a user, the hearing aid including;

a first component operable for placement in contact with skin of the user, the first component including a first pair of electrodes operable to be electrically coupled to the skin and a transmitter circuit operable to transmit electrical signals to the skin through said first pair of electrodes; and

a second component spaced apart from said first component, said second component being sized for placement in a passageway of an ear of the user, the second component including a receiver circuit to receive said electrical signals by electric conduction along the skin from said first component and an output device responsive to said electrical signals to stimulate hearing of the user.

22. The system of claim 21, wherein the second component includes a second pair of electrodes operable to electrically couple with the skin of the user to receive said electric signals.

23. The system of claim 21, wherein the second component is in the form of a cochlear implant.

24. The system of claim 21, wherein the first component includes an acoustic sensor.

25. The system of claim 21, wherein at least one of the first component and the second component includes a signal processor.

26. The system of claim 21, further comprising means for receiving an acoustic input.

27. The system of claim 26, further comprising means for processing the acoustic input.

28. The system of claim 27, wherein said receiving means includes at least two acoustic sensors configured to be spaced apart from one another.

29. The system of claim 27, wherein said first component includes a dielectric layer at least partially covering said first pair of electrodes.

30. A method, comprising:

operating a hearing aid including a first component and a second component, the first component including a first pair of electrodes and the second component including a second pair of electrodes;

placing the first component to electrically couple the first pair of electrodes to skin of a first ear of a user;

placing the second component to electrically couple the second pair of electrodes to skin of a second ear of the user;

generating an electric potential between the first pair of electrodes to transmit a first electrical communication signal from the first component through the skin of the first ear of the user; and

receiving the first electrical communication signal through the skin of the second ear with the second component over a transmission pathway between the first component and second component.

31. The method of claim 30, wherein the first pair of electrodes are each capacitively coupled to the skin of the first ear by a dielectric positioned therebetween.

32. The method of claim 30, wherein the hearing aid includes a third component carried with the user.

33. The method of claim 32, which includes wirelessly communicating between the third component and at least one of the first component and the second component.

34. The method of claim 33, wherein the first component is a cochlear implant.

35. The method of claim 30, wherein the first component includes a sensor to detect an acoustic excitation and one or more of the first component and the second component includes a signal processor.

36. A hearing aid system comprising:

a first hearing aid component including a first pair of electrodes, a first acoustic sensor to detect sound, and circuitry coupled to the first acoustic sensor and the first pair of electrodes, the first component being sized and shaped to be carried behind an ear of the user while electrically coupling the first pair of electrodes to a first region of skin of the user, the circuitry being operable to generate and transmit one or more electrical signals representative of the sound detected with the first acoustic sensor through the user when the first pair of electrodes are electrically coupled to the first region; and

a second component including a second pair of electrodes, the second component being sized and shaped to be carried by the user while electrically coupling the second pair of electrodes to a second region of the skin of the user, the second region being spaced apart from the first region, the second component being operable to wirelessly communicate through the user while the second pair of electrodes are electrically coupled to the second region.

37. The system of claim 36, wherein the second component is a behind-the-ear unit.

38. The system of claim 37, wherein said second component further includes a second acoustic sensor.

39. The system of claim 38, further comprising means for processing signals from the first acoustic sensor and the second acoustic sensor.

40. The system of claim 36, further comprising a cochlear implant.