Feedback adaptive noise cancellation (ANC) controller and method having a feedback response partially provided by a fixed-response filter
US10026388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2016 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Aug 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3055
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A controller for an adaptive noise canceling (ANC) system simplifies the design of a stable control response by making the ANC gain of the system independent of a secondary path extending from a transducer of the ANC system to a sensor of the ANC system that measures the ambient noise. The controller includes a fixed filter having a predetermined fixed response, and a variable filter coupled together. The variable response filter compensates for variations of a transfer function of a secondary path that includes at least a path from a transducer of the ANC system to a sensor of the ANC system, so that the ANC gain is independent of the variations in the transfer function of the secondary path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.