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3 Police L.Q. 5 (1973-1974)
Voiceprint Identification

handle is hein.journals/polqua3 and id is 118 raw text is: LAWRENCE G. KERSTA B.S., M.S., Columbia Uni- versity; former President of Voice- print Laboratory and research scientist for Bell Telephone Labo- ratories; founder of Voiceprint Identification Systems; author and lecturer. VOICEPRINT IDENTIFICATION By Lawrence G. Kersta Voiceprint Identification is a spectrographic method by which people can be identified by their voices. This method may be an important aid in helping law enforcement authorities identify criminals who use the telephone to threaten bombings of airlines and public buildings, those who make obscene telephone calls, telephone extortion threats, and kid- nappers who make ransom demands. Much like fingerprints, voiceprint identification uses the unique features in the spectrographic impressions of people's utterances. This article details the basic application method for the Voiceprint Identification System and areas of application. The voiceprint identification methodology was developed during the author's tenure at the Bell Telephone Laboratories, Murray Hill, New Jersey.' In two years of laboratory-controlled experiments using a relatively small population (123 members), a correct identification score of over 99% was achieved using the skills of trained high school girl panelists. The experiments, conducted over a two-year period, recorded the success scores for nine different girl panelists, during which over 50,000 identification attempts were made from a library of over 16,000 different voiceprints for the experimental 123-member populations. The controlled population consisted of 123 male voices, judged normal, with general American dialects, and no speech oddities which might make them easy to identify. 1 NATURE, Vol 196, No. 4861, pp. 1253-1257, Dec. 29, 1962.

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