Hearing aid with compensation of acoustic and/or mechanical feedback
US6128392A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Jun 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R25/505
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hearing aid has a microphone (1), or other electromechanical transducer, for converting an acoustic input signal into an electrical signal, a signal-processing and amplifying signal path (2, 3, 13, 4, 5, 6) and an output converter (7) which converts the amplified electrical signals back into acoustic signals, or in the case of an implanted hearing aid into mechanical signals, and a feedback digital finite impulse response filter (FIR filter) (9) for compensation of unwanted feedback (8) from the output converter to the microphone, in which the filter coefficients of filter (9) are determined by feeding a short pulse into the feedback signal path (5, 6, 7, 1, 2) and directly measuring the impulse response of this signal path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.