Acoustic diaphragm for speakers and method of producing the same

Details Acoustic diaphragm for speakers and method of producing the same Acoustic diaphragm for speakers and method of producing the same

1980-05-20

1981-11-17

Hix, L. T.

Acoustics

Diaphragm

Critically defined material or coating

179181R, H04R 708

Patent

active

043006558

ABSTRACT:
An acoustic diaphragm for speakers having a sandwich structure constituted by a core material comprising an elongated web material bent to have a plurality of radial projections, and upper and lower surface members adhered to the upper and lower edges of the core member, as well as a method of producing the same. The acoustic diaphragm of the invention has a reduced weight while exhibiting a large flexural rigidity so that the nodal line during the resonance vibration can have a circular form which in turn offers a circular form of nodal line and increased speaker power. Also, the method of producing the invention permits easy fabrication of the acoustic diaphragm having a sandwich structure.

REFERENCES:
patent: Re24141 (1956-04-01), Brennan
patent: 1740651 (1929-12-01), Huether
patent: 2624417 (1953-01-01), Brennan

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