Piezo speaker for improved passenger cabin audio systems

Details Piezo speaker for improved passenger cabin audio systems Piezo speaker for improved passenger cabin audio systems

1995-09-25

1999-05-04

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Vehicle

381 99, 381152, 381190, 381389, H04B 100, H04R 2500

Patent

active

059012315

ABSTRACT:
This invention outlines several applications of piezoelectric vibrators to produce quality flat panel speakers in passenger cabin applications. A system consisting of an audio amplifier and transformer is used to drive the piezo speaker. The electronics are packaged so that they fit in small modules that can be attached to a cabin structure to produce a speaker. The invention includes a variety of flat panel speaker designs, including one in which the existing structure is converted into a speaker, and thin membrane and or panels that are fitted with piezoelectric elements. A system consisting of cabin quieting and flat panel speakers is also discussed where the mid and high frequency audio is produced by panel speakers and the low frequency audio is produced from dynamic loudspeakers. The cabin systems discussed in this patent are applicable to automobiles, aircraft, trucks and buses.

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patent: 5073944 (1991-12-01), Hirasa
patent: 5321756 (1994-06-01), Patterson, Jr. et al.
patent: 5384855 (1995-01-01), Kwang

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