Method and apparatus to improve voice quality of cellular calls by noise reduction using a microphone receiving noise and speech from two air pipes
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United States of America Patent
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Issued Date -
Oct 11, 2007
app pub date -
Apr 11, 2006
filing date -
Apr 11, 2006
priority date (Note) -
Abandoned
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Abstract
A microphone collects voice sound waves from the user through one end of a pipe. Unwanted background noise is collected through the second end of the pipe. The inputs from the two ends of the pipe retain their acoustic wave format. The background signal is subtracted from the voice signal through acoustic wave destruction. The resulting signal has an increased signal to noise ratio useful for increased voice quality as well as call clarity.
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