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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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Prosodic peak estimation under segmental perturbations.

Greg Kochanski1

  • 1Phonetics Laboratory, Oxford University, Oxford OX1 2JF, United Kingdom.

The Journal of the Acoustical Society of America
|February 9, 2010
PubMed
Summary
This summary is machine-generated.

Accurately measuring speech intonation peaks is challenging due to segmental influences. A new "bracketed maximum" algorithm improves measurement precision by reducing variance in fundamental frequency (f0) peak position.

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Area of Science:

  • Phonetics
  • Speech Science
  • Computational Linguistics

Background:

  • Speech fundamental frequency (f0) peak measurement is complex.
  • Superposition models of f0 can lead to inaccurate peak localization.
  • Segmental variations can obscure true intonation patterns.

Purpose of the Study:

  • To investigate measurement techniques for speech fundamental frequency (f0) peaks.
  • To address inaccuracies caused by segmental effects in f0 peak measurement.
  • To introduce and evaluate a novel algorithm for more robust f0 peak detection.

Main Methods:

  • Comparison of measurement techniques for f0 peak position.
  • Introduction of the "bracketed maximum" algorithm.
  • Analysis of speech data with stable intonation and varying segmental structure.

Main Results:

  • Direct f0 maximum measurement can be misled by segmental factors.
  • The "bracketed maximum" algorithm demonstrates reduced measurement variance.
  • Variance in peak position measurements decreased by at least 15%.

Conclusions:

  • The "bracketed maximum" offers a more reliable method for intonation analysis.
  • This technique mitigates segmental influences on f0 peak measurement.
  • Improved accuracy in f0 peak localization aids phonological research.