Apparatus and method for analyzing acoustical signals
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United States of America Patent
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Feb 3, 1987
Grant Date -
N/A
app pub date -
Apr 4, 1984
filing date -
Apr 4, 1984
priority date (Note) -
Expired
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Abstract
A zero-crossing accoustical signal analyzer includes a plurality of parallel-connected adjacently tuned filter channels to separate an incoming accoustical signal into a plurality of adjacent sub-bands. Zero crossing analysis is provided for each of the sub-bands to determine the time period between successive zero crossings of signal components within each of the sub-bands. The reciprocal of the time periods from each sub-band is then simultaneously provided on a frequency vs. time display. Each filter channel also produces a signal proportional to the amplitude of signal frequency components within the respective sub-band for producing a frequency vs. amplitude display.
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