Apparatus and method for analyzing acoustical signals

Details Apparatus and method for analyzing acoustical signals Apparatus and method for analyzing acoustical signals

1984-04-04

1987-02-03

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

324 77B, 324 77E, 324 78F, G01H 308, G01R 23165

Patent

active

046401342

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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patent: 4523506 (1985-06-01), Hollimon

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