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voice identification
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voice identification

police technique
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Also known as: voicegraph, voiceprint
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Article History

voice identification, police technique for identifying individuals by the time, frequency, and intensity of their speech-sound waves. A sound spectrograph is employed to record these waves in the form of a graph that may be compared to graphs of other individuals and differentiated. Though voice graphs (or voiceprints) have been used in courtroom proceedings, the accuracy of this technique in identifying individuals is a subject of controversy among speech scientists.