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={N. C. Singh and F. 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… Expand
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References

SHOWING 1-10 OF 51 REFERENCES
Temporal Low-Order Statistics of Natural Sounds
TLDR
The results show that natural sounds are highly redundant, and have possible implications to the neural code used by the auditory system, particularly along the cochlear axis. Expand
Feature analysis of natural sounds in the songbird auditory forebrain.
TLDR
This study obtains neural responses from several regions of the songbird auditory forebrain to a large ensemble of bird songs and uses this data to calculate the spectral temporal receptive field (STRFs), which are the best linear model of the spectral-temporal features of sound to which auditory neurons respond. Expand
Robust Spectrotemporal Reverse Correlation for the Auditory System: Optimizing Stimulus Design
TLDR
The relationship between the spectrotemporal structure of any given stimulus and the quality of the STRF estimate is explored and exploited and the method, termed sum-of-ripples, is described, which enjoys the same practical advantages—which equate to faster and more accurate estimation—attributable to the time-domain sum- of-sinusoids method previously employed in vision research. Expand
Spectral envelope coding in cat primary auditory cortex: Properties of ripple transfer functions
TLDR
It is shown that responses of neurons in the primary audi­ tory cortex are influenced by a number of spec­ tral envelope parameters, including the spacing of peaks in the spectral envelope, the phase of the en­ velope, and its modulation depth. Expand
Spectro-temporal modulation transfer functions and speech intelligibility.
TLDR
A computational auditory model is presented that exhibits spectro-temporal MTFs consistent with the salient trends in the data and is used to demonstrate the potential relevance of these M TFs to the assessment of speech intelligibility in noise and reverberant conditions. Expand
Temporal and Spectral Sensitivity of Complex Auditory Neurons in the Nucleus HVc of Male Zebra Finches
TLDR
This study demonstrates how precisely spectral and temporal cues must be preserved for the full response of high-level auditory neurons sensitive to learned vocalizations in zebra finch song. Expand
Representation of Acoustic Communication Signals by Insect Auditory Receptor Neurons
TLDR
This study analyzes the response characteristics of the peripheral auditory system of grasshoppers with special emphasis on the representation of species-specific communication signals and concludes that auditory receptor neurons are optimized to extract both the time scales and the amplitude distribution of natural songs. Expand
Spectral envelope coding in cat primary auditory cortex: linear and non‐linear effects of stimulus characteristics
TLDR
These findings support a close relationship between pure‐tone receptive fields and ripple transfer functions, however, variations of other stimulus characteristics, such as spectral modulation depth, result in non‐linear alterations in the ripple transformation. Expand
Efficient coding of natural sounds
  • M. Lewicki
  • Computer Science, Medicine
  • Nature Neuroscience
  • 2002
TLDR
It is reported that several basic auditory nerve fiber tuning properties can be accounted for by adapting a population of filter shapes to encode natural sounds efficiently. Expand
Nonlinear Spectrotemporal Sound Analysis by Neurons in the Auditory Midbrain
TLDR
This work uses acoustic signals with a structurally rich time-varying spectrum to study linear and nonlinear spectrotemporal interactions in the central nucleus of the inferior colliculus (ICC), finding that ∼60% of ICC neurons meet this basic requirement for a linear integrating neuron. Expand
...
1
2
3
4
5
...