Some Experimental Studies on Speaker Recognition Using Voiceprints
K. S. B. Sinha, Shyam Sunder Agrawal · IETE Journal of Research · 1974
This paper reports some experimental studies related to the possibility of using sonagrams (or “Voiceprints”) for recognizing the speaker. In the present experiment ten (Hindi) vowels, embedded in four different contexts viz. isolation, h-d, hΛ y-y (concavity), and hΛ w-w (convexity), as spoken by three male speakers were analyzed with the ‘sonograph’. Both the fundamental frequency and the duration of the vowels were estimated. The data indicates a significant variation in these two parameters as a function of speaker as well as context. The pitch and duration of the vowels for different speakers were plotted in a two-dimensional space for each context. The plots (or vowel contours) in all the contexts indicate different contours for the speakers. The separation between the contours is even better when the data for different contexts are pooled. These observations suggest that pitch-duration contours of vowels could serve as satisfactory invarient cues for individual speakers.