Systems and methods for feedback detection
US9654874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Nov 22, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/01
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method for feedback detection by an electronic device is described. The method includes receiving a first microphone signal by a first microphone. A feedback loop includes the first microphone and a speaker. The method also includes receiving a second microphone signal by a second microphone that is outside of the feedback loop. A first signal based on the first microphone signal and a second signal based on the second microphone signal exhibit a higher correlation in presence of feedback and exhibit a lower correlation in absence of feedback. The method further includes determining a correlation based on the first microphone signal and the second microphone signal. The method additionally includes determining whether feedback is occurring based on the correlation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.