Diaphragm for an electro-acoustic transducer

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

1982-03-19

1983-10-25

Jacobs, Lewis T.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181167, 524449, C10K 1300, C08K 334

Patent

active

044121032

ABSTRACT:
A diaphragm for an electro-acoustic transducer comprising a sheet formed from a mixture of a polymer and mica, where the sheet contains (a) 30 to 95% by weight of a polymer selected from among polyolefins, polyesters, and polyamides and (b) 5 to 70% by weight of mica having a weight-average flake diameter not exceeding 500 microns and a weight-average aspect ratio of at least 10. By adding the specified mica, the sheet has a drastically improved dynamic modulus and a substantially unchanged loss tangent.

REFERENCES:
patent: 3520845 (1970-07-01), McKeown et al.
patent: 3764456 (1973-10-01), Woodhams
patent: 4026384 (1977-05-01), Yamachika et al.
patent: 4340516 (1982-07-01), Keeney

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