Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electrostrictive – magnetostrictive – or piezoelectric
Patent
1994-07-06
1997-06-10
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electrostrictive, magnetostrictive, or piezoelectric
381 88, 381152, 381158, 181141, 181148, 181153, 181199, H04R 2500
Patent
active
056384564
ABSTRACT:
This application outlines several applications of a piezoelectric materials invention to produce quality loudspeakers in applications where coil driven dynamic speakers are difficult or impossible to implement with an appreciable degree of sound quality. This invention includes a series of modifications to a laptop computer such as the IBM 750c. The modifications to the computer consist of placing piezoelectric patches behind the LCD and directly to the back wall of the laptop lid. Damping materials and stiffeners are also added to the back wall to reduce structural resonance. A system consisting of an audio amplifier and transformer is used to drive the piezo speaker.
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Conley John K.
Kokonaski William
Machacek Steven L.
Parrella Michael J.
DeJoseph Daniel
Kuntz Curtis
Nguyen Duc
Noise Cancellation Technologies, Inc.
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