Feedback-based correction of a control signal in an active noise control system
US10672377B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Sep 28, 2018 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Sep 28, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/504
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An active noise control (ANC) system uses a proportional integral (PI) controller to produce a control signal based on feedback that comprises a combination of ambient sound and antinoise. The ANC system generates a corrected control signal based on the control signal and a configurable filtering parameter, and produces the antinoise under control of the corrected control signal such that the antinoise destructively interferes with frequencies of the ambient sound to produce the feedback. The ANC system uses a microphone to receive the feedback and provide the feedback to the PI controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.