Methods and apparatus for reducing ambient noise based on annoyance perception and modeling for hearing-impaired listeners
View Patent ↗Disclosed herein, among other things, are apparatus and methods for annoyance perception and modeling for hearing-impaired listeners. One aspect of the present subject matter includes a method for improving noise cancellation for a wearer of a hearing assistance device having an adaptive filter. In various embodiments, the method includes calculating an annoyance measure or other perceptual measure based on a residual signal in an ear of the wearer, the wearer's hearing loss, and the wearer's preference. A spectral weighting function is estimated based on a ratio of the annoyance measure or other perceptual measure and spectral energy. The spectral weighting function is incorporated into a cost function for an update of the adaptive filter. The method includes minimizing the annoyance or other perceptual measure based cost function to achieve perceptually motivated adaptive noise cancellation, in various embodiments.
1. A method for improving noise cancellation for a wearer of a hearing assistance device having an adaptive filter, the method comprising:
calculating an annoyance measure based on a residual signal in an ear of the wearer, the wearer's hearing loss, and the wearer's preference;
estimating a spectral weighting function based on a ratio of the annoyance measure and spectral energy; and
incorporating the spectral weighting function into a cost function for an update of the adaptive filter.
2. The method of claim 1 , further comprising minimizing the annoyance based cost function to achieve perceptually motivated adaptive noise cancellation.
3. The method of claim 1 , comprising updating the cost function based on input noise.
4. The method of claim 3 , wherein updating the cost function includes updating the cost function during run-time.
5. The method of claim 3 , wherein updating the cost function includes using a noise type classifier.
6. The method of claim 3 , wherein updating the cost function includes updating the cost function adaptively.
7. The method of claim 3 , wherein updating the cost function includes using an update rate which depends upon the input noise.
8. The method of claim 1 , comprising using the cost function to minimize loudness.
9. The method of claim 8 , comprising using the cost function to minimize overall loudness of error residue.
10. The method of claim 8 , comprising using the cost function to minimize specific loudness.
11. A hearing assistance device for a wearer, comprising:
a housing; and
hearing assistance electronics within the housing;
wherein the hearing assistance electronics include an adaptive filter and are adapted to:
calculate an annoyance measurement based on a residual signal in an ear of the wearer, the wearer's hearing loss, and the wearer's preference;
estimate a spectral weighting function based on a ratio of the annoyance measurement and spectral energy; and
incorporate the spectral weighting function into a cost function for an update of the adaptive filter.
12. The device of claim 11 , further comprising a microphone.
13. The device of claim 11 , wherein the housing is adapted to mount in or about an ear of a person.
14. The device of claim 11 , wherein the hearing assistance electronics include a wireless communication unit.
15. The device of claim 14 , wherein the hearing assistance electronics use the wireless communication unit to synchronize the perceptually motivated adaptation between the left and right hearing devices.
16. The device of claim 14 , wherein the hearing assistance electronics use the wireless communication unit to obtain the wearer's preference from other wireless devices.
17. The device of claim 11 , wherein the housing includes an in-the-ear (ITE) hearing aid housing.
18. The device of claim 11 , wherein the housing includes a behind-the-ear (BTE) housing.
19. The device of claim 11 , wherein the housing includes an in-the-canal (ITC) housing.
20. The device of claim 11 , wherein the housing includes a receiver-in-canal (RIC) housing.
21. The device of claim 11 , wherein the housing includes a completely-in-the-canal (CIC) housing.
22. The device of claim 11 , wherein the housing includes an invisible-in-the-canal (IIC) housing.
23. The device of claim 11 , wherein the housing includes a receiver-in-the-ear (RITE) housing.