Noise cancelling microphone
US6963649B2 · kind B2 · utility
40Cited by
10References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 3, 2001 |
| Grant date | Nov 8, 2005 |
| Priority date | — |
| Expiry date | Jan 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/05
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved noise canceling microphone is provided including robust design features and advanced noise control and speech discrimination convergence characteristics. Two adaptive controllers are used to ensure robust performance in quickly changing acoustic environments ensuring an acceptable minimum performance characteristic. Additionally, a new real-time spectral estimation procedure is applied to a noise canceling communications microphone platform that permits continued and optimal adaptation of non-voice bandwidth frequencies during speech transients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.