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Influence of auditory fatigue on masked speech intelligibilityIntelligibility of PB word lists embedded in simultaneous masking noise was evaluated before and after fatiguing-noise exposure, which was determined by observing the number of words correctly repeated during a shadowing task. Both the speech signal and the masking noise were filtered to a 2825-3185-Hz band. Masking-noise leves were varied from 0- to 90-dB SL. Fatigue was produced by a 1500-3000-Hz octave band of noise at 115 dB (re 20 micron-Pa) presented continuously for 5 min. The results of three experiments indicated that speed intelligibility was reduced when the speech was presented against a background of silence but that the fatiguing-noise exposure had no effect on intelligibility when the speech was made more intense and embedded in masking noise of 40-90-dB SL. These observations are interpreted by considering the recruitment produced by fatigue and masking noise.
Document ID
19800047630
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Parker, D. E.
(Miami Univ. Oxford, OH, United States)
Martens, W. L.
(Miami Univ. Oxford, OH, United States)
Johnston, P. A.
(Miami University Oxford, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1980
Publication Information
Publication: Acoustical Society of America
Subject Category
Behavioral Sciences
Accession Number
80A31800
Funding Number(s)
CONTRACT_GRANT: NAS9-14258
CONTRACT_GRANT: F33615-75-C-5029
Distribution Limits
Public
Copyright
Other

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