Loudspeaker panel with a microphone and method for using both
US8280063B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2009 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Feb 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/403
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In public audio presentation it is desirable that the playback loudness is continuously adapted to the background noise loudness. Such adaptation of the playback volume requires a continuous measurement of the loudness somewhere within the sound exposure area. A dipole loudspeaker panel has a strong attenuation of the emitted sound in the panel plane. When placing a microphone capsule in that plane but outside the panel, the sound emitted from the panel will be recorded by the microphone with a significant sound pressure level attenuation. Such specific microphone arrangement can capture the background noise without being unduly disturbed by the direct sound emitted from the loudspeakers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.