Loudspeaker having a dual chamber acoustical enclosure with two external vents and one internal vent
US7136498B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Jun 9, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2842
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker includes an acoustical enclosure having an internal wall dividing the enclosure into first and second subchambers, an electro-acoustical transducer having a vibratable speaker cone mounted in an opening in the internal wall of the acoustical enclosure, an internal vent in the internal wall of the acoustical enclosure for pneumatically coupling the first and second subchambers, a first external vent in a wall of the first subchamber for pneumatically coupling the first subchamber to an exterior environment outside of the acoustical enclosure, and a second external vent in a wall of the second subchamber for pneumatically coupling the second subchamber to the exterior environment, a ratio of the acoustic masses of the internal vent to the the second external vent being approximately 3/1 to 7/1, and a ratio of the acoustic masses of the first external vent to the second external vent being approximately 15/1 to 30/1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.