Dynamic in-vehicle noise cancellation divergence control
US11205413B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Apr 27, 2020 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Apr 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/17879
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An 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 dynamically adapted thresholds. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.