Noise Cancellation Technologies, Inc.

William Kokonaski

Michael J Parrella

Graham P Eatwell

Michael P McLoughlin

Steven L Machacek

Stephen F Hildebrand

John K Conley

James W Hiney

This invention involves the integration of piezoelectric speaker panels and microphones into a personal computer with a sound card to form a novel multi-media computer. In addition noise cancellation electronics and algorithms are also applied to enhance performance of the voice recognition system.

Multimedia personal computer with active noise reduction and piezo

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.

Piezo speaker and installation method for laptop personal computer and

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Columbia, MD, United States of America

William Kokonaski