Performance-intensity functions at absolute and masked thresholds.
In most applications of audibility and articulation theories, it is assumed that absolute thresholds and thermal noise maskers affect speech recognition performance-intensity (P-I) functions similarly. The purpose of this study was to evaluate that assumption. Performance-intensity functions for NU-6 monosyllabic words were obtained from eight normal-hearing subjects in quiet and in the presence of two levels of a noise that produced masked pure-tone thresholds parallel to, but higher than, those of each individual in quiet. The results support the practice of treating absolute threshold as a noise-masked threshold in predictions of speech recognition performance.
Studebaker
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Memphis State University, Memphis Speech and Hearing Center, Tennessee 38105.
Gilmore
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Sherbecoe
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D000161:Acoustic Stimulation; D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D005260:Female; D006801:Humans; D008297:Male; D009622:Noise / Q000009:adverse effects*; D013063:Speech Discrimination Tests; D013067:Speech Perception / Q000502:physiology*