Loudspeaker enclosure arrangement for voice communication terminals
US4506759A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1983 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Jun 20, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/288
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides an enclosure arrangement or a loudspeaker adapted to be mounted in a voice communication terminal. The invention provides primary and secondary enclosures for the loudspeaker. The primary enclosure comprises a piece of resilient open cell foam material having one face provided with a concavity suitable for receiving the spider and the voice coil structure of the loudspeaker. The peripheral edge of the one face of the foam material is secured to the peripheral edge of the spider and the outer surface of the foam material has a flexible layer of substantially air-impermeable material, whereby the loudspeaker is provided with an attached flexible enclosure. The secondary enclosure comprises the housing in which the loudspeaker is mounted. The flexibility of the primary enclosure allows energy to be coupled between itself and the secondary enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.