Active noise eliminating system
US5426703A · kind A · utility
78Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1992 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | May 15, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/503
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise eliminating system comprises microphones for detecting residual noise, speakers for generating noise elimination sound for interference with the residual noise, a noise generating condition sensor for generating noise condition, a controller for generating noise elimination signals inputted to the speakers and determined by the detected residual noise signals and the detected noise condition signal in accordance with a control algorithm including transfer functions between the speakers and microphones respectively. The transfer functions are updated on the basis of a test signal generated when noise sound diverges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.