Method and apparatus for interpretation of sonar signals
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United States of America Patent
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Jun 11, 1996
Grant Date -
N/A
app pub date -
Sep 28, 1965
filing date -
Sep 28, 1965
priority date (Note) -
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Abstract
In the particular embodiment of the invention described herein, sonar signals in the range from 200-3600 cps. are analyzed by bandshifting selected segments of 100 cps. width to the range 300-400 cps. for analysis, and indications of signals in all of the bands are presented side-by-side on a continuous printer. in addition, the modulation envelope of the detected signal, which contains low frequency modulation components, is demodulated to provide indications of such low frequency components in a target signal.
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