Loudness-controlled processing of acoustic signals
US6370255B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1997 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Jul 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/43
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
With the method acoustic signals, e.g. in hearing aids, are processed in loudness-controlled manner in such a way that the loudness subjectively received by the hearing impaired person again always corresponds to the loudness received by listeners with normal hearing. Signal processing takes place without Fourier transformation and without subdivision of the signal into subband signals in iterative manner and completely in the time domain. This eliminates the disadvantage of unacceptably long signal delay times of known methods and permits a practical use. The apparatus for performing the method contains a processing stage (4) for the iterative calculation of a loudness-characteristic control quantity (&psgr;) and a correcting filter stage (7) controlled in time-dependent manner therewith. Compared with known methods, the inventive method requires only drastically reduced processing resources, which can mainly be attributed to the particularly efficient and unconventional implementation of the processing stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.