Correlograms and the Separation of Sounds
Richard O. Duda, Richard F. Lyon, Malcolm Slaney · 2005
The identification and description of the different components in amixture ofsounds i s afundamental but largely unsolvedproblem in acoustic signal processing. Licklider’s correlogram i s an alternative to short-time spectral analysis that provides important information for solving this problem. We present results of experiments with simple periodic signals and mixtures of synthe-sised vowels that support this conclusion. A simple additive synthesis experiment shows how common amplitude modulation groups components into sound sources. In addition, motions of the correlogram components expose the presence of sound compo-nents sharing common frequency modulation, which is a charac-teristic feature of natural, quasi-periodic signals.