Feedback active noise control system and strategy with online secondary-path modeling
US11688381B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2022 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Nov 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3047
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present disclosure presents a feedback active noise control system and strategy with online secondary-path modeling, and belongs to the technical field of active noise control. The linear prediction subsystem takes the residual noise as its input and separates the remaining sinusoidal noise from the broadband noise. The remaining sinusoidal noise is used effectively not only to update the controller but also to scale the auxiliary noise, while the broadband noise serves as a desired input of online secondary-path modeling subsystem. In this way, the coupling between the controller and the online secondary-path modeling subsystem is significantly mitigated, leading to both faster convergence and improved noise reduction performance. A practical scheme for refreshing the entire system is also developed to enhance its robustness against even abrupt changes with the secondary path or the primary noise. The present disclosure enhances the applicability of feedback active noise control in practical applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.