Spherical loudspeaker enclosure
US4281738A · kind A · utility
19Cited by
13References
8Claims
0Family size
Inventor
Key dates
| Filing date | Dec 26, 1979 |
| Grant date | Aug 4, 1981 |
| Priority date | — |
| Expiry date | Dec 26, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2888
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker enclosure of the acoustic suspension type has a hollow interior of a generally spherical shape, and the enclosure is formed of polyurethane foamed plastic in which the volume (V) of the enclosure interior is determined according to the following empirical formula: EQU V=[MD].sup.3 where M is the distance between the limits of mechanical excursion of a given loudspeaker mounted in an aperture in the enclosure as the diaphragm of the speaker is moved under a constant mechanical force, and D is the diameter of the loudspeaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.