Electrical apparatus with electro-acoustic transducer
US6668063B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The electrical apparatus (10) in particular a telephone comprises a box (12) and an electro-acoustic transducer (16) disposed in said box (12). Said box (12) comprises a bearing zone (25) supporting an ear of a user, said bearing zone (25) comprising an exit aperture (26) of said electro-acoustic transducer (16). Said box (12) furthermore comprises a decompression aperture (32) made through said bearing zone (25). The electrical apparatus (10) comprises an essentially sealed resonant enclosure (18), inside which is disposed said electro-acoustic transducer (16). Said enclosure (18) comprises an interference aperture (28) made through a wall (20) of said enclosure, and a leakage aperture (30) linking said rear volume (24) to the outside. Said interference aperture (28) emerges through said bearing zone (25). Said leakage aperture (30) emerges through a zone separate from said bearing zone (25). Said decompression aperture (32) emerges outside said enclosure (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.