×

Apparatus and method for analyzing acoustical signals

  • US 4,640,134 A
  • Filed: 04/04/1984
  • Issued: 02/03/1987
  • Est. Priority Date: 04/04/1984
  • Status: Expired due to Fees
First Claim
Patent Images

1. Apparatus for analyzing an acoustical signal having a plurality of signal components extending over a band of signal frequencies, comprising:

  • means for separating an acoustical signal into a plurality of sub-bands;

    means for measuring the time period between successive zero-crossings of signal components in each of said sub-bands;

    reciprocal means for extracting the reciprocal of the zero-crossing time periods of signal components in each of said sub-bands;

    display means for simultaneously displaying the time period reciprocals of signal components in each of said sub-bands; and

    means for sequentially scanning each of said sub-bands for the presence of a signal component therein, for causing a zero-crossing time period measurement to be made if said signal component is present in the selected sub-band, and for advancing to the next sub-band if no such signal component is present.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×