Trirectangular tetrahedral subwoofer
US8157049B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Apr 25, 2011 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Apr 25, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2420/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In some embodiments, a tetrahedral subwoofer enclosure includes a substantially triangular first face, second face, third face, and fourth face, a first corner at an intersection of the first, second and third faces, a second corner at an intersection of the first, second and fourth faces, a third corner at an intersection of the first, third and fourth faces, a fourth corner at an intersection of the second, third and fourth faces, wherein an angle between the first corner and a midpoint between the third corner and the fourth corner, having the second corner as its vertex, is substantially ninety degrees, wherein an angle between the third corner and the fourth corner, having the second corner as its vertex, is substantially ninety degrees, and a subwoofer driver attached to the third face, having a free air resonant frequency less than one hundred Hertz.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.