Active noise cancellation system, arrangement, and method
US7539459B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2004 |
| Grant date | May 26, 2009 |
| Priority date | — |
| Expiry date | Nov 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/17875
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Noise of a noise-producing object may be at least partially cancelled by a system that emits sound at a polarity substantially opposite to a polarity of detected noise and includes a member having elements disposed in the vicinity of a noise-producing object, some of the elements may be configured to emit noise, and some of the elements may be configured to detect noise and where a signal indicative of the detected noise may be received by a controller which sends a signal to cause at least some of the elements to emit sound at a polarity substantially opposite that of the detected noise, and includes an analyzer to determine when detected noise is indicative of one or more conditions of the noise producing object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.