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speech intelligibility in noise

Sorry for this (maybe obvious) request. Does anyone know a good
reference (with data) for speech intelligibility scores at different s/n
(more than 2) by hearing-impaired listeners. Most studies of HI
listeners present speech materials at one or two s/n levels (and usually
at different presentation levels). Clearly, since HI listeners have a
range of losses it is difficult to discuss average intelligibility
scores for a fixed presentation and s/n condition. Nevertheless, I would
like to find data showing s/n versus intelligibility (preferably
nonsense syllables or isolated words) for a group or HI listeners.

Thanks in advance.

Ken W. Grant

Walter Reed Army Medical Center
Army Audiology and Speech Center
Washington, DC 20307-5001

PHONE: (202) 782-8596
FAX: (202) 782-9228

EMAIL: grant@tidalwave.net