Compact and efficient sub-woofer system and method for installation in structural partitions
US4903300A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Apr 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loudspeaker system is provided for installation in a space between a front panel and an enclosed area behind the front panel of a partition such as a wall, ceiling or floor fronting a listening area. Electroacoustical transducers are provided which have a two sided vibratory diaphragm driven by an electrical signal. An enclosure mounts the electroacoustical transducers such that one side of the vibratory diaphragm is in contact with air outside the enclosing between the front and rear panels of the partition, with the enclosure being configured to substantially enclose and define a specific volume of air within the enclosure having a predefined acoustic compliance and which is in contact with the other side of the vibratory diaphragm of the electroacoustical transducers. The enclosure is mounted to the structural partition such that the enclosure extends into the space behind the front panel of the partition so that the one side of the vibratory diaphragm contacts a volume of air outside the enclosure within the space behind the front panel of the partition. A passive radiator such as a port which has a specific acoustic mass is provided for coupling the specific volume of air en…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.