Diaphragm for electro-acoustic transducer

Details Diaphragm for electro-acoustic transducer Diaphragm for electro-acoustic transducer

1980-05-29

1982-02-16

Hix, L. T.

Acoustics

Diaphragm

Critically defined material or coating

181169, 428118, G10K 1300, B32B 312, H04R 710

Patent

active

043155570

ABSTRACT:
A diaphragm for electro-acoustic transducer comprising a core member of honeycomb structure made of either a thin film of a metal or a high molecular material, and a skin member bonded to at least one side of this honeycomb core structure and being prepared by the use of aromatic polyamide fibers having a high tensile strength, a high Young's modulus and a high Young's modulus-to-weight ratio and reinforced by a thermo-setting resin. Such diaphragm has a high Young's modulus, an improved mechanical strength and a wide frequency range of piston motion, and presents reduced distortion throughout a wide frequency range, and has a superior transition characteristic, whereby a good sound reproduction characteristic is obtained.

REFERENCES:
patent: 3003191 (1961-10-01), Luth
patent: 4076098 (1978-02-01), Ward
patent: 4190746 (1980-02-01), Hardwood et al.
patent: 4198550 (1980-04-01), Matsuda

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