Diaphragm material for moving coil loudspeaker, may be laminated

Details Diaphragm material for moving coil loudspeaker, may be laminated Diaphragm material for moving coil loudspeaker, may be laminated

1977-03-18

1980-02-26

Stellar, George G.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

1791155ES, 181167, 181170, 181172, H04R 712, H04R 720, H04R 902

Patent

active

041907469

ABSTRACT:
A diaphragm for a moving evil loudspeaker is formed of a material which has a mechanical "0"value of from 7 to 12, a Youngs modulus of from 8.5 to 17.5 .times. 10.sup.5 KN/M.sup.2 and a density of from 0.85 to 1.05 g/cc. The diaphragm forming material is preferably formed of polypropylene or a propylene-containing copolymer. The diaphragm may be of cone or dome type and included are moving coil loudspeaker constructions wherein other vibrating elements, particularly spiders and outer cone support rings, are formed of the same type of material as the diaphragm.

REFERENCES:
patent: 1538319 (1925-05-01), Gaumont
patent: 2922851 (1960-01-01), Manley
patent: 3093207 (1963-06-01), Bozak
patent: 3111187 (1963-11-01), Barlow
patent: 3313018 (1967-04-01), Tibbetts
patent: 3345469 (1967-10-01), Rod
patent: 3464514 (1969-09-01), Mochida et al.
patent: 3898598 (1975-08-01), Asahi
patent: 3935397 (1976-01-01), West
patent: 4020296 (1977-04-01), Dahlquist

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