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Related Experiment Videos

Speaker identification utilizing noncontemporary speech.

H Hollien1, R Schwartz

  • 1Institute for Advanced Study of the Communication Processes, University of Florida, Gainesville 32611, USA. Hollien@GROVE.UFL.EDU

Journal of Forensic Sciences
|February 24, 2001
PubMed
Summary

Speaker identification accuracy remains high even with noncontemporary speech samples. Listener accuracy shows only modest decay over decades, minimally impacting speaker identification.

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Area of Science:

  • Forensic Science
  • Acoustics
  • Psychology

Background:

  • Speaker identification relies on voice analysis, facing challenges from noncontemporary speech samples.
  • Listener memory decay is a known factor in ear-witness identification.

Purpose of the Study:

  • To investigate the impact of time intervals on the accuracy of aural-perceptual speaker identification using noncontemporary speech.
  • To determine if noncontemporary speech poses a significant challenge comparable to listener memory decay.

Main Methods:

  • Conducted aural-perceptual speaker identification tests with speech samples separated by various time intervals: 4, 8, 32 weeks, 6 years, and 20 years.
  • Measured the mean correct identification rates across these different noncontemporary conditions.

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Main Results:

  • Mean correct identification initially dropped to 75-80% at 4 weeks.
  • Accuracy remained relatively stable for up to six years.
  • A significant drop to 33% correct identification was observed only after 20 years.

Conclusions:

  • Listener competency in identifying noncontemporary speech samples decays modestly over substantial time periods.
  • The noncontemporariness of speech samples has a minimal negative effect on the overall speaker identification process.