Hearing aid and method for eliminating acoustic feedback in the amplification of acoustic signals
US9078073B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 4, 2012 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Jul 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/43
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a hearing aid having a microphone to be arranged at a body of a user for capturing ambient sound, a loudspeaker for outputting the ambient sound after having been amplified on a frequency-dependent basis, and a signal processor, the signal processor is configured to amplify the sound such that the amplified sound is audible to the user, and to automatically re-adjust the gain by the following steps: selecting a tone having a specific frequency; outputting the tone and the amplified ambient sound via the loudspeaker as an output sound; capturing via said microphone an analysis sound composed of ambient sound and of a reflection of said output sound; extracting a reflection of the tone from the captured analysis sound; and determining a reflection component for the specific frequency of the tone; adjusting the gain in frequency-specific manner and based on the determined reflection component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.