Active noise control using phased-array active resonators
US5778081A · kind A · utility
Inventor
Key dates
| Filing date | Mar 4, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Mar 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/512
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise control system includes sensors 16,26 which detects noise 114 and provides electronic signals to an active noise control (ANC) controller 20. The controller provides electronic anti-noise signals to a speaker 24 which is connected to, and provides acoustic anti-noise into, a plurality of active resonators 120-124. The resonators 120-124 are disposed successively along the propagation direction of the noise 114 and provide time-delayed anti-noise acoustic output signals each of which attenuates a portion of the noise 114. The phasing of the anti-noise signals from the resonators 120-124 may be accomplished by acoustic and/or electronic time delays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.