Sound transducer

Details Sound transducer Sound transducer

1989-10-02

1991-03-05

Fuller, Benjamin R.

Acoustics

Diaphragm

With damping means

181144, 181164, 181171, 181173, 381186, 381188, 381203, 381205, G10K 1300

Patent

active

049970585

ABSTRACT:
An improved flat sound transducer including a planar diaphragm having at least one region suited for reproduction of low frequencies and one region suited for reproduction of high frequencies wherein the frame of the flat sound transducer is used to sandwich a foam strip between the frame and the diaphragm in order to dampen low frequency vibrations and substantially isolate the high frequency region from the large amplitude low frequency vibrations while still allowing high frequency vibrations to emanate from the entire sound transducer diaphragm. The dampening strip may used with either a metallic frame or with a unitary plastic frame. A high frequency enhancement coating may be used to increase the frequency response in the high frequency region of the diaphragm.

REFERENCES:
patent: 1751356 (1930-03-01), Pinkler
patent: 3509290 (1970-04-01), Mochida et al.
patent: 3596733 (1971-08-01), Bertagni
patent: 3722617 (1973-03-01), Bertagni
patent: 3767005 (1973-10-01), Bertagni
patent: 3779336 (1973-12-01), Bertagni
patent: 3792394 (1974-02-01), Bertagni
patent: 3801943 (1974-04-01), Bertagni
patent: 4003449 (1977-01-01), Bertagni
patent: 4184563 (1980-01-01), Bertagni
patent: 4257325 (1981-03-01), Bertagni
patent: 4315112 (1982-02-01), Hofer
patent: 4847908 (1989-07-01), Nieuwendijk et al.

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