Piezoelectric speaker

Details Piezoelectric speaker Piezoelectric speaker

1997-06-02

2000-05-16

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having acoustic wave modifying structure

310324, 381190, 381353, H04R 2500

Patent

active

060647469

ABSTRACT:
A piezoelectric speaker has a substantially reduced size and reproduces sound in the low sound range. The piezoelectric speaker includes a cylindrical main body. First and second sounding members are secured to apertures of both sides of the main body in an air tight arrangement via ringed dampers made of rubber. An external opening is created at the middle of a side surface of the main body. The opening is created so as to have an area which is less than area of a vibrating portion of the sounding members. Sound absorbing members are provided within the main body, on the outside of the first sounding member and on the outside of the second sounding member. Caps having a plurality of holes are secured to the apertures of the both sides of the main body so as to cover the sound absorbers. The main body is supported on concave portions of leg members.

REFERENCES:
patent: 2399513 (1946-04-01), Shapiro
patent: 2773942 (1956-11-01), Christensen
patent: 4413198 (1983-11-01), Bost
patent: 4700100 (1987-10-01), Congdon et al.
patent: 4714133 (1987-12-01), Skaggs, Jr.
patent: 5318837 (1994-06-01), Yoshinaka et al.
patent: 5386479 (1995-01-01), Hersh

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