Speaker Verification Experiments
Subrata Kumar Das, W. S. Mohn, S. L. Saleeby · The Journal of the Acoustical Society of America · 1971
Speaker verification is defined as confirming a speaker's purported identity. The method of confirmation is to compare a speech sample of the person against his speech profile, which is based on previous utterances of the same phrase. Experiments have demonstrated the feasibility of an automated scheme of speaker verification under certain restrictions. Important among these restrictions are the use of only male speakers, wide-band (180–8000 Hz) audio channel, and noise-free environment. The experiments used a total of about 7000 utterances of the phrase “Check available terminals” from 118 speakers. An average misclassification rate of 1% with a “no decision” rate of 10% was obtained. Further work is directed toward removing some of the restrictions, such as reducing the bandwidth and including female utterances. The strategy for improving the system performance is to reduce the “no decision” rate without increasing the misclassification rate.