Acoustics – Diaphragm and enclosure – Reflex baffle
Patent
1978-11-24
1979-11-06
Tomsky, Stephen J.
Acoustics
Diaphragm and enclosure
Reflex baffle
181144, 181152, 181199, H05K 500
Patent
active
041732669
ABSTRACT:
A loudspeaker enclosure is disclosed which includes a horizontal bottom wall, parallel spaced vertical front and rear walls connected with the bottom wall, the front wall containing an opening for receiving a loudspeaker, and a horizontal top wall connected with the upper edges of the front and rear walls. The invention is characterized by the provision of vertical baffle walls which define a converging compression chamber behind the loudspeaker opening in the front wall, and a pair of exponential folded horns arranged laterally on opposite sides of the compression chamber. Each of the baffle walls between the compression chamber and the folded horns contains at least one opening adjacent its forward edge, each of the openings having a generally trapezoidal vertical cross-section, the vertical dimension of the front portion of the opening being greater than the vertical dimension of the rear portion of the opening. The bass-reflex response from the loudspeaker matches the total volume of the compression chamber and the pair of folded horns, which response passes from the compression chamber through the openings and through the pair of exponential folded horns.
REFERENCES:
patent: 1791173 (1931-02-01), Thorington
patent: 2206012 (1940-07-01), Hart
patent: 2491982 (1949-12-01), Kincart
patent: 2604182 (1952-07-01), Massa
patent: 2765864 (1956-10-01), Glenn
patent: 2866513 (1958-12-01), White
patent: 2971598 (1961-02-01), Sieler
patent: 3898384 (1975-08-01), Goeckel
Pizer Robert S.
Tryon Max
Laubscher Lawrence E.
Tomsky Stephen J.
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