Acceptance of noise with intelligible, reversed, and unfamiliar primary discourse.
OBJECTIVE
The purpose of this study was to investigate the effects of intelligible and unintelligible primary discourse on acceptance of noise. Of particular interest was the effect of intelligibility on the most comfortable loudness (MCL) component of acceptable noise level (ANL).


METHODS
ANLs were measured for 30 participants using an intelligible discourse, a reversed discourse, and an unfamiliar primary discourse. For each discourse, MCL and background noise level (BNL) were found. The ANL was then computed by subtracting the mean BNL from the MCL.


RESULTS
The intelligibility of the primary discourse did not affect MCL. The ANL was significantly different for the intelligible versus reversed condition and the intelligible versus unfamiliar (Chinese) condition.


CONCLUSIONS
Results indicate that ANL may change as speech intelligibility changes and/or speech recognition ability decreases in adults with normal hearing.
Department of Speech Pathology and Audiology, 2000 UCOM, University of South Alabama, Mobile, AL 36688-0002, USA. gordonhickey@usouthal.edu
Susan
S
Gordon-Hickey
Robert E
RE
Moore
D000328:Adult; D001288:Attention; D001309:Auditory Threshold; D005260:Female; D006801:Humans; D008144:Loudness Perception; D009622:Noise; D013018:Sound Spectrography; D013061:Speech Acoustics; D013063:Speech Discrimination Tests; D013069:Speech Reception Threshold Test; D055815:Young Adult