Ribbon-type electro-acoustic transducer with low distortion and

Details Ribbon-type electro-acoustic transducer with low distortion and Ribbon-type electro-acoustic transducer with low distortion and

1982-05-17

1984-11-20

Rubinson, Gene Z.

H04R 902

Patent

active

044840373

ABSTRACT:
A ribbon-type electro-acoustic transducer has a magnet system which comprises an upper plate (2, 3) and a center pole (1) between which an air gap (8) is formed. A diaphragm (7) on which conductors (9) are arranged is disposed in the air gap. The upper plate (2, 3) comprises two plate-shaped parts (2', 3' and 2", 3" respectively) between which a space (11) is formed in which an edge portion of the diaphragm is located. This results in a more homogeneous magnetic field so that the transducer distortion may be reduced. Moreover, the transducer sensitivity is improved and is suitable for handling signals in the mid-range audio frequency spectrum. The cavity (15) enclosed by the magnet system and the diaphragm (7) can be acoustically coupled, be via an additional cavity to a (bass-reflex) duct or an additional (passive radiator) diaphragm.

REFERENCES:
patent: 4001522 (1977-01-01), Kasatkin
patent: 4156801 (1979-05-01), Whelan
patent: 4276452 (1981-06-01), Suyama
patent: 4281223 (1981-07-01), Ugaji
patent: 4413160 (1983-11-01), Ohyaba

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