Systems for feedback cancellation in an audio interface garment
US5664019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1995 |
| Grant date | Sep 2, 1997 |
| Priority date | — |
| Expiry date | Feb 8, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/023
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio interface garment includes systems for attenuating the influence of sound waves generated by audio output devices on output signals from a plurality of input devices an. In one embodiment, input signals which are applied to the audio output devices are combined by a mixer to form a mixed audio signal. A plurality of Widrow-Hoff least mean square adaptive filters each form a corresponding filtered signal based upon the mixed audio signal and the output signal from a corresponding one of the input devices. A plurality of processed signals are formed by differencing each filtered signal from the corresponding output signal. The weight values of the adaptive filters are modified according to the least mean square method. The processed signals provide signals in which the first sound waves are attenuated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.