Transmission detection and switch system for hearing improvement applications

• US 6,694,034 B2
• Filed: 12/28/2000
• Issued: 02/17/2004
• Est. Priority Date: 01/07/2000
• Status: Expired due to Term

• Current Assignee: III Holdings 7, LLC
• Original Assignee: Etymotic Research Incorporated
• Inventors: Julstrom, Stephen D., Matzen, Norman P., Carlson, Elmer V., Schulein, Robert B., Soede, Willem
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Ensey, Brian
• Application Number:
  US09/752,806
• Publication Number:
  US 20030044033A1
• Time in Patent Office: 1,146 Days
• Field of Search: 381/312, 381/313, 381/315, 381/320, 381/321, 381/324, 381/23.1, 381/151, 381/314, 381/317, 381/318, 455/569.1, 455/41.2, 455/575.2, 455/556, 455/557, 379/55.1, 379/56.1, 379/56.3
• US Class Current: 381/315
• CPC Class Codes: H04R 2225/51 Aspects of antennas or their circuitry in or for hearing aids
• CPC Class Codes: H04R 2225/61 Aspects relating to mechanical or electronic switches or control elements, e.g. functioning
• CPC Class Codes: H04R 25/43 Electronic input selection or mixing based on input signal analysis, e.g. mixing or selection between microphone and telecoil or between microphones with different directivity characteristics H04R25/407 takes precedence
• CPC Class Codes: H04R 25/502 using analog signal processing
• CPC Class Codes: H04R 25/552 Binaural
• CPC Class Codes: H04R 25/554 using a wireless connection, e.g. between microphone and amplifier or using Tcoils
• CPC Class Codes: H04R 25/603 of mechanical or electronic switches or control elements

Abstract

A hearing aid system for selecting one of two audio sources is disclosed. The hearing aid system comprises hearing aid circuitry, such as, for example, a hearing aid amplifier and speaker, as well as a primary source for audio, such as, for example, a hearing aid microphone. The hearing aid system also comprises a secondary source for audio, such as, for example, a directional microphone worn or otherwise supported by a person speaking or by the hearing aid user, as well as detection and switch circuitry to select which of the primary and secondary audio sources should be directed to the hearing aid circuitry. In operation, the detection and switch circuitry receives a signal transmission (preferably wireless) from the secondary audio source and determines whether the signal received is desirable. If the signal transmission is desirable, the circuitry selects that signal for coupling with the hearing aid circuitry. If the transmission signal is not desirable, the circuitry selects the signals from the primary audio source for coupling with the hearing aid circuitry.

Claims

1. A hearing aid system comprising:

hearing aid circuitry;

a first audio source for generating a first audio signal;

a second audio source for generating a second audio signal, the second audio source having a wireless transmitter for transmitting the second audio signal wirelessly;

a receiver for receiving the second audio signal from the wireless transmitter of the second audio source; and

circuitry for analyzing the second audio signal received, and for selecting at least one of the first and second audio signals for coupling to the hearing aid circuitry based on the analysis of the second audio signal received, the circuitry coupling a combination of the second audio signal and the first audio signal attenuated by less than a predetermined amount when the analysis indicates that the second audio signal meets a selected criterion, and coupling only the first audio signal to the hearing aid circuitry when the analysis indicates that the second audio signal does not meet the selected criterion.

2. The hearing aid system of claim 1 wherein the first audio source comprises an omnidirectional hearing aid microphone.

3. The hearing aid system of claim 1 wherein the first audio source comprises a directional hearing aid microphone.

4. The hearing aid system of claim 1 wherein the secondary audio source comprises one of a directional microphone, an array microphone, an audio transmitter, or a telephone.

5. The hearing aid system of claim 1 wherein the circuitry selects the second audio signal if the second audio signal is above a predetermined threshold.

6. The hearing aid system of claim 1 wherein the hearing aid circuitry comprises a hearing aid amplifier and a speaker.

7. The hearing aid system of claim 1 wherein the hearing aid circuitry comprises a speaker.

27. The hearing aid of claim 1 wherein the predetermined amount is approximately 20 dB.

28. The hearing aid of claim 1 wherein the second audio signal is transmitted using a pulse width modulated magnetic field.

29. The hearing aid of claim 1 wherein the second audio signal is transmitted using a frequency modulated magnetic field.

30. The hearing aid of claim 29 wherein the wireless transmitter comprises at least two transmit inductors, each of the at least two transmit inductors being arranged to have a different peak frequency response.

8. A hearing aid comprising;

hearing aid circuitry;

a microphone for generating a first audio signal;

a receiver for wirelessly receiving a second audio signal generated externally to the hearing aid; and

circuitry for analyzing the second audio signal received, and for selecting at least one of the first and second audio signals for coupling to the hearing aid circuitry based on the analysis of the second audio signal received, the circuitry coupling a combination of the second audio signal and the first audio signal attenuated by less than a predetermined amount when the analysis indicates that the second audio signal meets a selected criterion, and coupling only the first audio signal to the hearing aid circuitry when the analysis indicates that the second audio signal does not meet the selected criterion.

9. The hearing aid of claim 8 wherein the microphone is one of a directional or an omnidirectional microphone.

10. The hearing aid system of claim 8 wherein the circuitry selects the second audio signal if the second audio signal is above a predetermined threshold.

11. The hearing aid system of claim 8, wherein the hearing aid circuitry comprises a hearing aid amplifier and a speaker.

12. The hearing aid system of claim 8 wherein the hearing aid circuitry comprises a speaker.

31. The hearing aid of claim 8 wherein the predetermined amount is approximately 20 dB.

13. A hearing aid system comprising:

hearing aid circuitry;

a first audio source for generating a first audio signal;

a receiver for receiving a second audio signal wirelessly from a second audio source;

a detector for detecting receipt of the second audio signal and for generating a control signal based thereon, the control signal having at least a first state and a second state; and

an electronic switch for selecting at least one of the first audio signal and the second audio signal based on the control signal generated by the detector, and for coupling to the hearing aid circuitry a combination of the second audio signal and the first audio signal attenuated by less than a predetermined amount when the control signal is in the first state, and coupling only the first audio signal to the hearing aid circuitry when the control signal is in the second state.

14. The hearing aid system of claim 13 wherein the first audio source comprises an omnidirectional hearing aid microphone.

15. The hearing aid system of claim 13 wherein the first audio source comprises a directional hearing aid microphone.

16. The hearing aid system of claim 13 wherein the secondary audio source comprises one of a directional microphone, an array microphone, an audio transmitter, or a telephone.

17. The hearing aid system of claim 13 wherein the hearing aid circuitry comprises a hearing aid amplifier and a speaker.

18. The hearing aid system of claim 13 wherein the hearing aid circuitry comprises a speaker.

32. The hearing aid of claim 13 wherein the predetermined amount is approximately 20 dB.

19. A hearing aid comprising;

hearing aid circuitry;

a microphone for generating a first audio signal;

a receiver for wirelessly receiving a second audio signal generated externally to the hearing aid;

a detector for detecting receipt of the second audio signal and for generating a control signal based thereon, the control signal having at least a first state and a second state; and

an electronic switch for selecting at least one of the first audio signal and the second audio signal based on the control signal generated by the detector, and for coupling to the hearing aid circuitry a combination of the second audio signal and the first audio signal attenuated by less than a predetermined amount when the control signal is in the first state, and coupling only the first audio signal to the hearing aid circuitry when the control signal is in the second state.

20. The hearing aid system of claim 19 wherein the microphone is one of a directional or an omnidirectional microphone.

21. The hearing aid system of claim 19 wherein the hearing aid circuitry comprises a hearing aid amplifier and a speaker.

22. The hearing aid system of claim 19 wherein the hearing aid circuitry comprises a speaker.

33. The hearing aid system of claim 19 wherein the predetermined amount is approximately 20 dB.

23. A method of operating a hearing aid system comprising:

generating a first audio signal;

generating a second audio signal;

wirelessly transmitting the second audio signal;

receiving the second audio signal;

analyzing the second audio signal received;

selecting at least one of the first and second audio signals based on the analysis of the second audio signal received;

attenuating the first audio signal by less than a predetermined amount if the second audio signal is selected;

refraining from attenuating the first audio signal if only the first audio signal is selected;

combining the selected signals to produce a combined signal; and

coupling the combined signal to an input.

34. The method of claim 23 wherein the predetermined amount is approximately 20 dB.

35. The method of claim 23 wherein the transmitting is accomplished using a pulse width modulated magnetic field.

36. The hearing aid of claim 23 wherein the transmitting is accomplished using a frequency modulated magnetic field.

37. The hearing aid of claim 36 wherein the transmitting uses at least two transmit inductors, each of the at least two transmit inductors being arranged to have a different peak frequency response.

24. A method of operating a hearing aid system comprising:

generating a first audio signal;

receiving a wirelessly transmitted second audio signal;

analyzing the second audio signal received;

selecting at least one of the first and second audio signals based on the analysis of the second audio signal received;

attenuating the first audio signal by less than a predetermined amount if the second audio signal is selected;

refraining from attenuating the first audio signal if only the first audio signal is

combining the selected signals to produce a combined signal; and

coupling the combined signal to an input.

38. The method of claim 24 wherein the predetermined amount is approximately 20 dB.

25. A method of operating a hearing aid system comprising:

generating a first audio signal;

receiving a wirelessly transmitted second audio signal;

determining whether the second audio signal received meets a selected criterion;

coupling the second audio signal combined with the first audio signal attenuated by less than a predetermined amount to an input if the second audio signal meets the selected criterion; and

coupling only the first audio signal to the input if the second audio signal does not meet the selected criterion.

39. The method of claim 25 the predetermined amount is approximately 20 dB.

26. A method of operating a hearing aid system comprising:

generating a first audio signal;

generating a second audio signal;

wirelessly transmitting the second audio signal;

receiving the second audio signal;

determining whether the second audio signal received meets a selected criterion;

coupling the second audio signal combined with the first audio signal attenuated by less than a predetermined amount to an input if the second audio signal meets the selected criterion; and

coupling only the first audio signal to the input if the second audio signal does not meet the selected criterion.

40. The method of claim 26 wherein the predetermined amount is approximately 20 dB.