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Comparison between electroglottography and electromagnetic glottography.

I R Titze1, B H Story, G C Burnett

  • 1Department of Speech Pathology and Audiology and National Center for Voice and Speech, The University of Iowa, Iowa City 52242, USA.

The Journal of the Acoustical Society of America
|January 21, 2000
PubMed
Summary
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Newly developed electromagnetic glottographic sensors show promise for voice analysis, accurately detecting glottal closure across various phonation types. Agreement on wave shape varied, favoring breathy and falsetto voices over pressed and vocal fry.

Area of Science:

  • Biomedical Engineering
  • Acoustic Science
  • Speech Science

Background:

  • Established electroglottography (EGG) provides insights into vocal fold dynamics.
  • Novel glottographic sensors using electromagnetic waves offer a new approach to voice analysis.

Purpose of the Study:

  • To compare the performance of new electromagnetic glottographic sensors against a standard electroglottographic device.
  • To evaluate sensor agreement under various phonation conditions and registers.

Main Methods:

  • Four male subjects participated, undergoing testing under normal, breathy, and pressed vocal fold adduction.
  • Phonation included falsetto, chest, and fry registers at different pitches.
  • Electromagnetic sensors were compared to a conventional electroglottographic device for glottal closure and wave shape analysis.

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Main Results:

  • Consistent detection of glottal closure events was observed between both sensor types.
  • Wave shape agreement was higher for falsetto and breathy phonation compared to pressed voice and vocal fry.
  • Differences were attributed to the distinct operating modes (conduction vs. scattering) and field patterns of the devices.

Conclusions:

  • Electromagnetic glottography demonstrates potential for accurate glottal closure detection.
  • The diffraction mode of electromagnetic sensors appears favorable for voice analysis.
  • Future applications may include non-contact glottography and array configurations for enhanced glottal spatial resolution.