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Related Experiment Videos

Estimating perceived phonatory pressedness in singing from flow glottograms.

Johan Sundberg1, Margareta Thalén, Paavo Alku

  • 1Speech Music Hearing Department, KTH, Stockholm, Sweden. pjohan@speech.kth.se

Journal of Voice : Official Journal of the Voice Foundation
|April 9, 2004
PubMed
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The normalized amplitude quotient (NAQ) effectively predicts perceived vocal pressedness, accounting for 73% of variations. This finding links acoustic measures to subjective vocal quality in singing.

Area of Science:

  • Vocal acoustics
  • Speech science
  • Singing voice analysis

Background:

  • Glottal adduction influences phonation modes and perceived vocal pressedness.
  • The normalized amplitude quotient (NAQ) is a proposed acoustic correlate of glottal adduction.

Purpose of the Study:

  • To investigate the relationship between NAQ and perceived phonatory pressedness in a professional singer.
  • To determine the predictive power of NAQ for subjective vocal pressedness across different phonation types and loudness levels.

Main Methods:

  • A professional singer produced triad patterns in various phonation types (breathy, flow, neutral, pressed) and loudness levels (soft, middle, loud).
  • Singing styles (classical, pop, jazz, blues) were also analyzed under different loudness conditions.
  • A panel of experts rated perceived phonatory pressedness using visual analogue scales.

Related Experiment Videos

  • NAQ values were calculated from flow glottograms and correlated with expert ratings.

    • Main Results:

    • A strong correlation was observed between NAQ values and expert-rated pressedness.
    • Approximately 73% of the variation in perceived pressedness could be explained by variations in NAQ.
    • NAQ demonstrates significant potential as an objective measure for vocal pressedness.

    Conclusions:

    • NAQ is a reliable acoustic indicator of perceived phonatory pressedness in singing.
    • This study validates the use of NAQ for quantifying vocal fold closure and phonation type.
    • Findings support the integration of NAQ in voice analysis for singers and speech-language pathologists.