Document Detail

Sound texture perception via statistics of the auditory periphery: evidence from sound synthesis.
MedLine Citation:
PMID:  21903084     Owner:  NLM     Status:  MEDLINE    
Rainstorms, insect swarms, and galloping horses produce "sound textures"--the collective result of many similar acoustic events. Sound textures are distinguished by temporal homogeneity, suggesting they could be recognized with time-averaged statistics. To test this hypothesis, we processed real-world textures with an auditory model containing filters tuned for sound frequencies and their modulations, and measured statistics of the resulting decomposition. We then assessed the realism and recognizability of novel sounds synthesized to have matching statistics. Statistics of individual frequency channels, capturing spectral power and sparsity, generally failed to produce compelling synthetic textures; however, combining them with correlations between channels produced identifiable and natural-sounding textures. Synthesis quality declined if statistics were computed from biologically implausible auditory models. The results suggest that sound texture perception is mediated by relatively simple statistics of early auditory representations, presumably computed by downstream neural populations. The synthesis methodology offers a powerful tool for their further investigation.
Josh H McDermott; Eero P Simoncelli
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Neuron     Volume:  71     ISSN:  1097-4199     ISO Abbreviation:  Neuron     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-09-09     Completed Date:  2011-10-28     Revised Date:  2014-08-27    
Medline Journal Info:
Nlm Unique ID:  8809320     Medline TA:  Neuron     Country:  United States    
Other Details:
Languages:  eng     Pagination:  926-40     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Inc. All rights reserved.
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MeSH Terms
Acoustic Stimulation / methods
Auditory Pathways / physiology*
Auditory Perception / physiology*
Models, Biological*
Models, Statistical
Recognition (Psychology) / physiology
Spectrum Analysis
Grant Support
//Howard Hughes Medical Institute; //Howard Hughes Medical Institute

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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