Sound isolation cabinet using two sound sources to generate complimentary sound waves
US6434240B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Two or more speakers are used to generate complimentary sound waves within a soundproof cabinet. The sounds generated inside the cabinet are detected by a microphone and sent to an external device for recording or listening purposes. In one embodiment, two speakers are arranged side-by-side and mounted on a panel. The panel serves to section off two chambers within the cabinet. The primary chamber is the chamber toward which the speakers are facing. The secondary chamber is the chamber within which the backs of the speakers are positioned. The speakers are connected to the input signal in reverse polarity of each other. Thus, during operation one speaker is pushing air outward while the other is pulling air inward. This complimentary generation of sound waves alleviates the muffling effect of the small isolated space and allows the speakers to generate sound as though they were in a much larger open area. Thus, the sound picked up by the microphone is very close to the desired “live” sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.