Modulation spectra of natural sounds and ethological theories of auditory processing.

@article{Singh2003ModulationSO,
  title={Modulation spectra of natural sounds and ethological theories of auditory processing.},
  author={Nandini Chatterjee Singh and Fr{\'e}d{\'e}ric E. Theunissen},
  journal={The Journal of the Acoustical Society of America},
  year={2003},
  volume={114 6 Pt 1},
  pages={
          3394-411
        }
}
The modulation statistics of natural sound ensembles were analyzed by calculating the probability distributions of the amplitude envelope of the sounds and their time-frequency correlations given by the modulation spectra. These modulation spectra were obtained by calculating the two-dimensional Fourier transform of the autocorrelation matrix of the sound stimulus in its spectrographic representation. Since temporal bandwidth and spectral bandwidth are conjugate variables, it is shown that the… 
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