Document Detail

Most comfortable loudness for pure tones and speech in the presence of masking noise.
MedLine Citation:
PMID:  1186159     Owner:  NLM     Status:  MEDLINE    
Pure-tone and speech most-comfortable-loudness (MCL) levels were determined in noise and quiet. A Bekesy-type tracking task was used to determine the MCLs under all conditions. The subjects (N = 12) tracked their MCLs for five frequencies (250, 500, 1000, 20008, and 4000 Hz) in the presence of four white-noise levels (55, 65, 75, and 85 dB SPL) and in quiet. Speech MCLs were tracked under the identical noise conditions. The results indicated that the mean MCLs for tones between 500 and 4000 Hz, and for the speech stimuli, systematically increased as a function of the masking level. The rate of this increase was 7 dB per 10-dB noise increment for both stimulus modes when the level of the noise exceeded 65 dB SPL. At levels below 65 dB SPL, however, pure-tone MCL increases were only about 3 dB per 10-dB noise increment, while the slope of the speech MCL function remained relatively unchanged. The variability of MCL judgments for both stimulus modes decreased as a function of increased masking.
A M Richards
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of speech and hearing research     Volume:  18     ISSN:  0022-4685     ISO Abbreviation:  J Speech Hear Res     Publication Date:  1975 Sep 
Date Detail:
Created Date:  1976-01-17     Completed Date:  1976-01-17     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0376336     Medline TA:  J Speech Hear Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  498-505     Citation Subset:  IM    
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MeSH Terms
Acoustic Stimulation / methods
Auditory Perception*
Perceptual Masking*

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

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