Multi-microphone active noise cancellation system
US8447045B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/3219
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The present technology provides systems and methods for robust feedforward active noise cancellation which can overcome or substantially alleviate problems associated with the diverse and dynamic nature of the surrounding acoustic environment. A multi-faceted analysis decouples the background noise within the earpiece from the acoustic wave (e.g. the anti-noise and desired audio) generated by an audio transducer within the earpiece. A difference signal is formed utilizing monitoring signals captured by array of monitoring microphones within the earpiece. The difference signal is formed such that contributions due to the acoustic wave generated by the audio transducer are selectively attenuated. As a result, the difference signal indicates an acoustic energy level of the background noise within the earpiece.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.