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Frequency and voice: perspectives in the time domain.

Rick M Roark1

  • 1Department of Otolaryngology, New York Medical College, Valhalla, NY 10595, USA. roark@nymc.edu

Journal of Voice : Official Journal of the Voice Foundation
|April 22, 2006
PubMed
Summary

Voice frequency analysis is complex due to non-stationary signals. This study explores time-domain methods for precise, instantaneous frequency measurement in voice production.

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Area of Science:

  • Acoustics
  • Signal Processing
  • Speech Science

Background:

  • Voice production relies on frequency variation, crucial for communication and the arts.
  • Voice signals are inherently non-stationary, complicating traditional frequency analysis.
  • Existing frequency measurement techniques yield discrepancies, especially for non-periodic signals.

Purpose of the Study:

  • To formally examine frequency in voice production from the time domain perspective.
  • To identify the sources of discrepancies in various time-domain frequency measurement techniques.
  • To explore signal modeling for a continuous and instantaneous description of voice frequency.

Main Methods:

  • Analysis of time-domain techniques for frequency measurement in voice signals.
  • Examination of sinusoidal models with time-varying phase.
  • Application of the analytic signal method and empirical mode decomposition.

Main Results:

  • Discrepancies in time-domain frequency measures stem from signal non-stationarity.
  • Sinusoidal models with time-varying phase enable continuous and instantaneous frequency descriptions.
  • The analytic signal method combined with empirical mode decomposition offers a comprehensive time-domain approach.

Conclusions:

  • Understanding voice frequency from the time domain is essential for accurate analysis.
  • Advanced signal processing techniques can overcome ambiguities in non-stationary voice signals.
  • This work provides a foundation for a more nuanced understanding of voice frequency characteristics.

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