Structural assembly for housing an acoustical system

Details Structural assembly for housing an acoustical system Structural assembly for housing an acoustical system

1988-12-05

1990-04-17

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

381153, 381173, 381205, 181155, 181160, 310324, 310327, H01L 4108

Patent

active

049187384

ABSTRACT:
An acoustical system for generating loud sound levels over a wider bandwidth includes a generally cylindrically-shaped cavity formed of a wall member and having front and back ends. A baffle member is disposed to close the front end of the cavity, and a rear wall panel is disposed to close the back end of the cavity. A crystal/diaphragm driver assembly is formed of a bimorph piezoelectric crystal of a generally circular configuration and a generally conical-shaped diaphragm whose apex is fixedly attached to the center of the crystal. The driver assembly serves to convert electrical signals applied thereto into acoustical signals. The crystal is freely suspended at a first predetermined distance from the rear wall panel to form a rear Helmholtz loading chamber therebetween. The baffle member is spaced at a second predetermined distance from the crystal so as to form a front, outer enclosing chamber therebetween.

REFERENCES:
patent: 3909530 (1975-09-01), Gosswiller
patent: 3921016 (1975-11-01), Livermore et al.
patent: 4292561 (1981-09-01), Martin
patent: 4368400 (1983-01-01), Taniguchi et al.
patent: 4413198 (1983-11-01), Bost
patent: 4602245 (1986-07-01), Yang et al.
patent: 4604606 (1986-08-01), Sweany
patent: 4811816 (1989-03-01), Lin

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