Patent ID: 7012854

Claim:
A method for detecting acoustic signals emitted from a signal source, comprising: sensing the emitted signals using a plurality of sensors and providing a plurality of analog acoustic signals; filtering the analog acoustic signals; converting the filtered signals to a corresponding plurality of digital signals; windowing and transforming the digital signals to a frequency domain and providing a corresponding plurality of frequency domain signals; suppressing tonal and noise characteristics of the frequency domain signals and providing a corresponding plurality of suppressed signals; combining the suppressed signals and providing a combined signal; developing a total spectral histogram from the combined signal; designing a frequency domain window from the total spectral histogram; combining the frequency domain window and the plurality of frequency domain signals in a frequency bin and providing a corresponding plurality of reconstituted emitted signals; time domain cross-correlating the reconstituted signals and providing a time domain cross-correlated signal; identifying the time domain cross-correlated signal; and measuring the identified signal.