Adaptive noise-canceling with dynamic filter selection based on multiple noise sensor signal phase differences
US12340786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2022 |
| Grant date | Jun 24, 2025 |
| Priority date | — |
| Expiry date | Nov 21, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/1081
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An adaptive noise-canceling system generates an anti-noise signal with a filter that has a response controlled by a set of coefficients selected from a collection of coefficient sets. The adaptive noise-canceling system includes an acoustic output transducer for reproducing a signal containing the anti-noise signal, a first microphone for measuring ambient noise at a first location to produce a first noise measurement signal, a second microphone for measuring the ambient noise at a second location to generate a second noise measurement signal, and an analysis subsystem for analyzing the first noise measurement signal and the second noise measurement signal. The adaptive noise-canceling system also includes a controller that selects the set of coefficients from the collection of coefficient sets according to a phase difference between the first noise measurement signal and the second noise measurement signal as determined by the analysis subsystem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.