Abstract

Acoustic reflexes were elicited from seven normal-hearing subjects with synthesized isolated consonant and vowel-like stimuli. Stimulus intensity and duration were controlled so that equivalent amplitudes and specific durations were produced. The recorded stimulus items were presented over an earphone to the subject's right ear, while susceptance changes in response to bilateral acoustic reflex contractions were monitored in the subject's contralateral (left) ear. Analysis of variance was performed on the data for acoustic reflex thresholds. No significant difference between isolated consonant and vowel-like reflex threshold values was demonstrated. The main effects of stimulus duration and subjects, and the two-way interaction of phoneme type by subject were found to be significant. [Work supported by NIH.]

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