The Threshold Reliability Of Recorded Sustained Vowels

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Abstract
In a preliminary exploration of the thresholds of recorded sustained vowels continuous tape loops of 9 General American vowels were presented to 10 normal hearing listeners to obtain the threshold of detectability. Significant differences were found among the vowels tested. There wsa a high correlation between vowel threshold and formant location, a moderate correlation between vowel threshold and peak power. Variations resulting from various errors appeared to be extremely slight. Tape recorded sustained vowel loops consititute reliable testing stimuli.