Multimedia personal computer with active noise reduction and piezo speakers
AssigneeNoise Cancellation Technologies, Inc.
InventorsGraham P. Eatwell, Michael P. McLoughlin, Stephen F. Hildebrand, William Kokonaski, James W. Hiney
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Abstract
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.
Claims21
A laptop computer employing integrated piezoelectric panels and microphone in a novel arrangement, said computer comprising
- a main housing means,
- lid means physically and operatively connected to said main housing means, said lid means being configured as a hollow enclosure, display means on said lid means and adapted to provide a visual display,
- piezoelectric panel means on said lid means and adapted in conjunction with said hollow enclosures, to provide an audio output, control means situated within said main housing means and adapted to drive said piezoelectric audio output and said visual display means in response to input signals,
- input means adapted to provide inputs to said control means, wherein said input means includes a voice recognition means and microphone means adapted to function with said voice recognition means to produce input signals to said control means, and wherein said control means includes
- analog to digital conversion means adapted to process said microphone means inputs,
- finite impulse filter means adapted to receive the output from said conversion means,
- summing means adapted to receive the output of said impulse means and adapted to produce a composite digital output,
- automatic gain adjustment means adapted to process said composite digital output, and
- multiplying digital to analog conversion means adapted to receive said processed output and to change the sensitivity of said microphone means.
A personal computer system having unique transducing means to thereby enhance audio inputs and outputs, said system including
- (a) a three dimensional enclosure means with a display means thereon, said enclosure means having multiple planar surface wall means,
- (b) a transducing means comprising a piezoelectric element means mounted on at least one of said planar surface means, said transducing means adapted to vibrate the enclosure means and said enclosure means adapted to act as a speaker in response to activation of said transducing means,
- (c) control means adapted to receive inputs and convert them to visual display and audio outputs,
- (d) input means adapted to produce inputs to said control means, wherein input means includes a voice recognition circuit means and microphone means adapted to function with said voice recognition circuit means to produce input signals to said control means;
- wherein said control means includes
- analog to digital conversion means adapted to process said microphone array inputs,
- finite impulse filter means adapted to receive the output from said conversion means,
- summing means adapted to receive the output of said impulse means and adapted to produce a composite digital output,
- automatic gain adjustment means adapted to process said composite digital output, and
- multiplying digital to analog conversion means adapted to receive said processed output and to change the sensitivity of said microphone means.
Dependencies are inferred from the claim text.