Active noise control system with on-line secondary path modeling
US6847721B2 · kind B2 · utility
6Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2001 |
| Grant date | Jan 25, 2005 |
| Priority date | — |
| Expiry date | Feb 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3049
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise control system is provided to specify an input transducer, an error transducer, an output transducer and an active noise controller for generating an anti-phase canceling acoustic signal to attenuate an input noise and to output a reduced noise. The active noise control system also performs on-line secondary path modeling. For this purpose the active noise control system comprises, in addition to known systems, a secondary path change detection circuitry (6), a signal distinguishing circuitry (7) and an auxiliary noise control circuitry (8), all of them being used to model said secondary path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.