Techniques for Objective Speaker Identification
G. D. Hair, Thomas W. Rekieta · The Journal of the Acoustical Society of America · 1973
A technique has been developed and tested for identifying from voice recordings which, if any, of a number of possible speakers corresponds to a particular object speaker recording. Segments of the same set of selected phonemes by the object speaker and all suspect speakers are Fourier transformed. These phoneme spectra, and features derived therefrom, are utilized to make measures of voice similarity. Experiments with voice recordings by 140 men have yielded estimates of the probability of correct identification as a function of the number of suspects for both forced-choice and open-choice tests. Identification reliability has also been related to number of phonemes, number of utterances, and number and type of features. Open-choice decision reliability of 99% or better for small numbers of suspects was demonstrated. Another decision procedure, whereby decisions are made in only 95% to 99% of cases, can reduce error probabilities essentially to zero.