Systems and methods for adaptive noise cancellation
US7248703B1 · kind B1 · utility
4Cited by
63References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 13, 2002 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Aug 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system (400) for reducing non-acoustic noise includes a primary sensor (420), at least one secondary sensor (410), a filter (415), and a summation unit (425). The primary sensor (420) measures pressure and produces a primary pressure signal. The at least one secondary sensor (410) measures pressure and produce a secondary pressure signal. The filter (415) processes the secondary pressure signal to produce a filtered pressure signal. The summation unit (425) subtracts the filtered pressure signal from the primary pressure signal to reduce non-acoustic noise in the primary pressure signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.