IP Library Granted Patent US 12,192,706
Granted Patent B2
US 12,192,706 · App. 17/159,500 · Granted Jan 7, 2025

Intermodulation distortion reduction in a contact hearing system

Inventors: Stuart W. Wenzel (San Carlos, CA); Lawrence W. Arne (Palo Alto, CA)
Assignee: Earlens Corporation
H04R25/456H01F27/24H01F38/14H02M3/08H02M7/10H04B5/00H04R3/04H04R25/02H04R25/554H04R25/602H04R25/606H04R25/609H04R25/652H02J50/12H02M7/06H04R25/505H04R2225/021H04R2225/0216H04R2225/025H04R2225/33H04R2460/11H04R2460/13
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Quick Facts
Patent No.
US 12,192,706
App. No.
17/159,500
Granted
Jan 7, 2025
Kind
B2
Abstract

In embodiments of the invention, the present invention is directed to a contact hearing system including: a transmit circuit including a transmit coil positioned in an ear tip, THE transmit circuit having a first bandpass characteristic, wherein the transmit circuit is tuned such that a center of the first bandpass characteristic is set at a first frequency; and a receive circuit including a receive coil positioned on a contact hearing device, the receive circuit having a second bandpass characteristic, wherein the receive circuit is tuned such that a center of the second bandpass characteristic differs from the center of the first bandpass characteristic.

Claims (50)

1. A contact hearing system comprising:

a transmit circuit comprising a transmit coil positioned in an ear tip, the transmit circuit having a first bandpass characteristic, wherein the transmit circuit is tuned such that a center of the first bandpass characteristic is set at a first frequency; and

a receive circuit comprising a receive coil positioned on a contact hearing device, the receive circuit having a second bandpass characteristic, wherein the receive circuit is tuned such that a center of the second bandpass characteristic is set to a second frequency and differs from the center of the first bandpass characteristic, and wherein the first frequency is selected to be less than 10% lower than the second frequency.

2. A contact hearing system according to claim 1 , wherein the transmit circuit is tuned such that the center of the first bandpass characteristic is a transmit carrier frequency.

3. A contact hearing system according to claim 2 , wherein the transmit carrier frequency is approximately 2.56 MHz.

4. A contact hearing system according to claim 1 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency above a transmit carrier frequency.

5. A contact hearing system according to claim 1 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to approximately 2.852 MHz.

6. A contact hearing system according to claim 1 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency within 5 percent of the carrier frequency corresponding to the center of the first bandpass characteristic.

7. A contact hearing system according to claim 1 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency within 10 percent of a carrier frequency corresponding to the center of the first bandpass characteristic.

8. A contact hearing system according to claim 1 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency which is within the bandpass characteristics of the transmit circuit.

9. A method of tuning a transmit circuit and a receive circuit, wherein the transmit and receive circuit form components of a contact hearing system, the transmit circuit having a bandpass characteristic and the receive circuit having a receive bandpass characteristic, the method comprising the steps of:

tuning bandpass characteristics of the transmit circuit such that a center of the transmit bandpass characteristic is set to a first frequency; and

tuning bandpass characteristics of the receive circuit such that a center of the receive bandpass characteristic is set to a second frequency differing from the first frequency, wherein the first frequency is selected to be less than 10% lower than the second frequency.

10. A method of tuning according to claim 9 , wherein the first frequency is a transmit carrier frequency.

11. A method of tuning according to claim 10 , wherein the first frequency is approximately 2.56 MHz.

12. A method of tuning according to claim 9 , wherein the transmit circuit comprises a transmit coil wound on a ferrite core, the transmit coil and ferrite core being positioned in an ear tip.

13. A method of tuning according to claim 12 , wherein the receive circuit comprises a receive coil positioned on a contact hearing device.

14. A method of tuning according to claim 12 , wherein the transmit circuit and the receive circuit are adapted to be positioned in an ear canal of a user.

15. A method according to claim 9 , wherein the first frequency is selected to be less than 5 percent lower than the second frequency.

16. A method according to claim 9 , wherein the second frequency is within the bandpass characteristics of the transmit circuit.

17. A method according to claim 16 , wherein the second frequency is selected such that a signal at the second frequency and passed through a filter having the bandpass characteristics of the transmit circuit is attenuated by less than six decibels.

18. A method according to claim 17 , wherein the second frequency is selected such that the signal at the second frequency and passed through a filter having the bandpass characteristics of the receive circuit is attenuated by less than three decibels.

19. A contact hearing system comprising:

a transmit circuit comprising a transmit coil positioned in an ear tip, the transmit circuit having a first passband, wherein the transmit circuit is tuned such that a center of the first passband is set at a first frequency; and

a receive circuit comprising a receive coil positioned on a contact hearing device, the receive circuit having a second passband, wherein the receive circuit is tuned such that a center of the second passband differs from the center of the first passband and such that the center of the second passband is within the first passband.

20. A method of tuning a transmit circuit and a receive circuit, wherein the transmit and receive circuit form components of a contact hearing system, the transmit circuit having a passband and the receive circuit having a passband, the method comprising the steps of:

tuning the passband of the transmit circuit such that a center of passband of the transmit circuit is set to a first frequency; and

tuning the bandpass characteristics of the receive circuit such that a center of the passband of the receive circuit is set to a second frequency differing from the first frequency, wherein the second frequency is within the passband of the transmit circuit.

21. A contact hearing system comprising:

a transmit circuit comprising a transmit coil positioned in an ear tip, the transmit circuit having a first bandpass characteristic, wherein the transmit circuit is tuned such that a center of the first bandpass characteristic is set at a first frequency;

a receive circuit comprising a receive coil positioned on a contact hearing device, the receive circuit having a second bandpass characteristic, wherein the receive circuit is tuned such that a center of the second bandpass characteristic differs from the center of the first bandpass characteristic; and

wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency which is lower than the first frequency and is within the first bandpass characteristic of the transmit circuit.

22. A contact hearing system according to claim 21 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency below a transmit carrier frequency.

23. A contact hearing system according to claim 21 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency within 5 percent of the carrier frequency corresponding to the center of the first bandpass characteristic.

24. A contact hearing system according to claim 21 , wherein the receive circuit is tuned such that the center of the second bandpass characteristic is tuned to a frequency within 10 percent of the carrier frequency corresponding to the center of the first bandpass characteristic.

25. A method of tuning a transmit circuit and a receive circuit, wherein the transmit and receive circuit form components of a contact hearing system, the transmit circuit having a bandpass characteristic and the receive circuit having a receive bandpass characteristic, the method comprising the steps of:

tuning the bandpass characteristics of the transmit circuit such that a center of the transmit bandpass characteristic is set to a first frequency; and

tuning the bandpass characteristics of the receive circuit such that a center of the receive bandpass is set to a second frequency differing from the first frequency, wherein the second frequency is lower than the first frequency, and wherein the second frequency is within the transmit bandpass characteristic of the transmit circuit.

26. A method of tuning according to claim 25 , wherein the first frequency is a transmit carrier frequency.

27. A method of tuning according to claim 25 , wherein the transmit circuit comprises a transmit coil wound on a ferrite core, the transmit coil and ferrite core being positioned in an ear tip.

28. A method of tuning according to claim 27 , wherein the receive circuit comprises a receive coil positioned on a contact hearing device.

29. A method of tuning according to claim 27 , wherein the transmit circuit and the receive circuit are adapted to be positioned in an ear canal of a user.

30. A method according to claim 25 , wherein the second frequency is selected such that a signal at the second frequency and passed through a filter having the bandpass characteristics of the transmit circuit is attenuated by less than six decibels.

31. A method according to claim 30 , wherein the second frequency is selected such that the signal at the second frequency and passed through a filter having the bandpass characteristics of the transmit circuit is attenuated by less than three decibels.

32. A method according to claim 25 , wherein the second frequency is selected such that a signal at the second frequency and passed through a filter having the bandpass characteristics of the transmit circuit is attenuated by between 20 and 25 decibels.

33. A method according to claim 25 , wherein the first frequency is within the bandpass characteristics of the receive circuit.

34. A method according to claim 33 , wherein the first frequency is selected such that a signal at the first frequency and passed through a filter having the bandpass characteristics of the receive circuit is attenuated by between 10 and 15 decibels.

35. A method according to claim 25 , wherein:

the second frequency is selected such that a signal at the second frequency and passed through a filter having the bandpass characteristics of the transmit circuit is attenuated by between 20 and 25 decibels; and

the first frequency is selected such that a signal at the first frequency and passed through a filter having the bandpass characteristics of the receive circuit is attenuated by between 10 and 15 decibels.

Assignments (2)
SECURITY INTEREST Recorded Oct 20, 2021
From: EARLENS CORPORATION
To: CRG SERVICING LLC, AS ADMINISTRATIVE AGENT
Reel/Frame 058544/0318 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 27, 2021
From: WENZEL, STUART W.; ARNE, LAWRENCE W.
To: EARLENS CORPORATION
Reel/Frame 055050/0370 →
Continuity (9)
Continuation PCTUS2019042935 · Jul 23, 2019
Provisional Application 62712458 · Jul 31, 2018
Provisional Application 62712462 · Jul 31, 2018
Provisional Application 62712466 · Jul 31, 2018
Provisional Application 62712474 · Jul 31, 2018
Provisional Application 62712478 · Jul 31, 2018
Provisional Application 62831074 · Apr 8, 2019
Provisional Application 62831085 · Apr 8, 2019
Related Publication 20210152952A1 · May 20, 2021
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