On September 28, 1962, Life Magazine published the following fascinating article about voiceprints:
"Device picks Jack from all the pack"
"The Kennedy mimics may sound just like the President to people, but they do not fool a highly sensitive machine which makes voice-prints that may be as infallible in identifying individuals as fingerprints are. The device was developed by Bell Telephone for a very serious purpose: to help law-enforcement agencies identify persons who have been heard but not seen. The tape of a voice, perhaps recorded on the phone or by wiretapping, is fed to a stylus which transcribes electronic impulses into squiggly graphs. The squiggles trace volume, resonance and pitch which are never the same for any two people. As the voice-prints at left and below show, the machine can unmask even the cleverest of imitators."
An accompanying caption mentions that the voiceprint technique was created by Dr. Lawrence Kersta of Bell Laboratories. Check out this video.
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