Subband algorithm with threshold for robust broadband active noise control system
US10121464B2 · kind B2 · utility
3Cited by
10References
20Claims
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Key dates
| Filing date | Dec 8, 2014 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Dec 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3218
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise control (ANC) system includes a speaker and one or more processors. The one or more processors implement an adaptive subband filtered reference control algorithm that applies thresholds to reference and error feedback signal paths such that, in response to a series of broadband non-Gaussian impulsive reference signals indicative of road noise in the vehicle having an audible frequency range of 20 Hz to 20 kHz, weight coefficients defining an adaptive filter of the control algorithm converge and permit the ANC system to partially cancel the road noise via output of the speaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.