Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent
1989-04-21
1990-02-20
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Hearing aid
381 90, 381188, 381205, 181150, H04R 502
Patent
active
049033000
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 enclosed by the enclosure to the air outside the enclosure in the listening area. A compression plate is provided spaced between the transducer diaphragm and the rear panel to isolate the rear panel from intense direct sound pressure from the transducer.
REFERENCES:
patent: 3067834 (1962-12-01), May
patent: 3848090 (1974-11-01), Walker
patent: 4146744 (1979-03-01), Veranth
patent: 4296280 (1981-10-01), Richie
patent: 4593404 (1986-06-01), Bolin
patent: 4778027 (1988-10-01), Taylor
Isen Forester W.
Parrett Sherman O.
Polk Investment Corporation
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