Loudspeaker device
US4044855A · kind A · utility
13Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1975 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Oct 30, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker device, wherein a speaker cabinet fitted with a speaker unit is filled with flexible gas-bearing material and fibrous cotton-like material. According to this invention, it is possible to increase the apparent inner volume of the cabinet, prevent the generation of a standing wave and reproduce sounds with a good quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.