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Acoustic signature recognition and identification

  • US 6,173,074 B1
  • Filed: 09/30/1997
  • Issued: 01/09/2001
  • Est. Priority Date: 09/30/1997
  • Status: Expired due to Term
First Claim
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1. A system for recognizing and identifying acoustic signals from a sensor, comprising:

  • a pre-processor for generating a gray-level image of the acoustic signals;

    a feature extractor for detecting, tracking and characterizing at least one line of the gray-level image, said feature extractor calculating a fundamental frequency for each of said at least one line and grouping said at least one line into harmonically related lines based on said fundamental frequency; and

    a post-processor for determining a harmonic content of said at least one line and comparing said harmonic content against known acoustic signatures by calculating a weighted score based on said fundamental frequency.

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