Document Detail

Broadband masking noise and behavioral pure tone thresholds in cats.
MedLine Citation:
PMID:  6630733     Owner:  NLM     Status:  MEDLINE    
The threshold for detection of pure tones in broadband noise was determined for three cats using an auditory reaction time procedure. Critical ratio is defined as the ratio of the signal power at the masked threshold for detection to the spectrum level of the noise. Critical ratios were obtained for 250-, 500-Hz, and 1-, 2-, 4-, 8-, and 16-kHz tones over a wide range of noise intensities. Results indicate that critical ratios increase with the frequency of the tone stimulus. At frequencies below 4 kHz, critical ratios remain constant at moderate and high noise intensities. For frequencies above 4 kHz, critical ratios increase as the level of the masking noise is raised from moderate to high levels. The difference between low- and high-frequency behavior of the level dependence of critical ratios is considered in terms of two possible mechanisms: (1) different mechanisms may be involved in the encoding of low- and high-frequency information by the nervous system or (2) the difference in level dependence may be due to attenuation by the action of the middle ear muscles at high sound levels.
J A Costalupes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  74     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  1983 Sep 
Date Detail:
Created Date:  1983-12-17     Completed Date:  1983-12-17     Revised Date:  2006-12-27    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  758-64     Citation Subset:  IM    
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MeSH Terms
Auditory Perception / physiology*
Auditory Threshold / physiology*
Cats / physiology*

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

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