The effects of unfiltered and bimodal filtered stimulus conditions on speech discrimination in noise through simulated television audio circuitry

Author

Susan McPhail

Date of Award

12-1982

Degree Type

Thesis

Degree Name

Master of Arts

Major

Audiology

Major Professor

David M. Libscomb

Committee Members

Carl Asp, Anna Nabelek

Abstract

A comparison was made of speech intelligibility scores for CID Everyday Sentences presented in +10dB signal-to-noise ratio in two listening conditions. Ten subjects with mild-to-moderate high frequency sensory hearing impairments were used. One condition consisted of an unfiltered presentation through simulated television audio circuitry. The second condition presented the stimuli bimodally through simulated television audio circuitry employing a 1000 Hz low band pass filter and a 4000 Hz high band pass filter, with slopes of 18 dB per octave toward the outer frequencies and 65 dB per octave toward the center frequencies.

Analysis of the data revealed a significant difference at the .05 level, indicating intelligibility scores to be better in the un-filtered condition. Also, the intelligibility scores of the hearing-impaired subjects deteriorated considerably in noise when compared to scores obtained in quiet.

Recommended Citation

McPhail, Susan, "The effects of unfiltered and bimodal filtered stimulus conditions on speech discrimination in noise through simulated television audio circuitry. " Master's Thesis, University of Tennessee, 1982.
https://trace.tennessee.edu/utk_gradthes/15056