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Binaural speech discrimination under noise in hearing-impaired listenersThis paper presents the results of an assessment of speech discrimination by hearing-impaired listeners (sensori-neural, conductive, and mixed groups) under binaural free-field listening in the presence of background noise. Subjects with pure-tone thresholds greater than 20 dB in 0.5, 1.0 and 2.0 kHz were presented with a version of the W-22 list of phonetically balanced words under three conditions: (1) 'quiet', with the chamber noise below 28 dB and speech at 60 dB; (2) at a constant S/N ratio of +10 dB, and with a background white noise at 70 dB; and (3) same as condition (2), but with the background noise at 80 dB. The mean speech discrimination scores decreased significantly with noise in all groups. However, the decrease in binaural speech discrimination scores with an increase in hearing impairment was less for material presented under the noise conditions than for the material presented in quiet.
Document ID
19890023907
Document Type
Reprint (Version printed in journal)
Authors
Kumar, K. V. (NASA Johnson Space Center Houston, TX; Institute of Aviation Medicine, Bangalore, India)
Rao, A. B. (Institute of Aviation Medicine Bangalore, India)
Date Acquired
August 13, 2013
Publication Date
October 1, 1988
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 59
ISSN: 0095-6562
Subject Category
AEROSPACE MEDICINE
Distribution Limits
Public
Copyright
Other