Word: voiceprints
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Dates: during 1967-1967
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Convicting Evidence. Kersta's conclusion-and his voiceprint technique-is based on the principle that every individual's voice is as unique as his fingerprints. Because the frequencies and energy distribution of the human voice are determined by the size and coupling of the nasal, throat and oral cavities and by the manner in which each person uses his articulators (tongue, teeth, lips, soft palate and jaw muscles), Kersta says, it is highly improbable that any two voices can be identical. Thus, voiceprints, like fingerprints, can be used to make a positive identification. Whispering, muffling the voice, changing...
Since he developed the voiceprint system at Bell Telephone Laboratories in 1962, Kersta has worked with law enforcement agencies on more than 100 cases involving voice identification. His voiceprints were used to convict a rioter in the Watts area of Los Angeles who, with his back to the camera, admitted to a TV interviewer that he had set fire to five different buildings. Last year voiceprints were admitted as evidence in a jury trial in New York...