In-vehicle noise cancellation adaptive filter divergence control
US11380297B2 · kind B2 · utility
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5References
20Claims
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Key dates
| Filing date | Jan 8, 2021 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | Jan 8, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/12822
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A active noise cancellation (ANC) system may include an adaptive filter divergence detector for detecting divergence of the one or more controllable filters as they adapt, based on various temporal or frequency domain amplitude characteristics. Upon detection of a controllable filter divergence, the ANC system may be deactivated, or certain speakers may be muted. Alternatively, the ANC system may modify the diverged controllable filters to restore proper operation of the noise cancelling system. This may include adjusting a leakage value of an adaptive filter controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.