Active acoustic control in remote regions
US5701350A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1996 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Jun 3, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3027
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active acoustic attenuation system in which the region of desired acoustic control is remote from an error sensor. The invention uses an adjusted error signal from the remote error sensor to update an adaptive control filter. The adaptive control filter drives an output transducer which outputs a secondary input that destructively interferes with and cancels an acoustic disturbance. Adaptation of the adaptive control filter compensates for the error sensor being remote from the region of desired control by adjusting the error signal in accordance with an H filter representing a relationship between a disturbance signal measured by the error sensor and a disturbance signal as would be measured in the region of desired control. The invention includes feedforward and regenerative feedback embodiments, as well as SISO and MIMO embodiments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.