Speaker enclosure and method of producing same

Details Speaker enclosure and method of producing same Speaker enclosure and method of producing same

1980-11-13

1983-07-12

Pellinen, A. D.

Acoustics

Diaphragm and enclosure

Reflex baffle

181152, 181155, 179181F, 179 1E, H04R 120

Patent

active

043925480

ABSTRACT:
An improved speaker enclosure apparatus re-radiates biphase sound emanating from a speaker supported therein. When connected to receive a differential sound signal, the sound produced complements the direct sound radiating from "right" and "left" speakers. The enclosure is of compliant material, such that at low frequencies the entire enclosure expands and contracts with the expansion and contraction of the speaker diaphragm, responsive to volume expansion and contraction of the air enclosed in the enclosure. At high frequencies, only thinned portions of the enclosure expand and contract, responsive to the higher frequency sound wavefronts emanating from the speaker. The ability to mold the enclosure and the thinned portions provides a method of controlling the radiated wavefront to a desired shape to be propagated into the listening environment.

REFERENCES:
patent: 2757751 (1952-04-01), Tavares
patent: 2905260 (1955-02-01), Williams
patent: 3912866 (1975-10-01), Fox
patent: 3962544 (1976-06-01), Kobayashi
patent: 4057689 (1977-11-01), Stallings
Leonard Feldman, Third Channel, Radio & TV News, Mar. 1959, p. 105.

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