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Related Experiment Videos

Speech spectra for six recorded monosyllabic word tests

R L Sherbecoe1, G A Studebaker, M R Crawford

  • 1Memphis State University, Tennessee.

Ear and Hearing
|April 1, 1993
PubMed
Summary

Speech spectra analysis revealed variations across different word test recordings, impacting Articulation Index calculations. These differences highlight the need for careful consideration of recording methods in speech intelligibility assessments.

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Area of Science:

  • Audiology
  • Speech Science
  • Acoustics

Background:

  • Speech spectra analysis is crucial for understanding speech intelligibility.
  • Previous studies established reference spectra for continuous speech.
  • Variations in speech materials can influence acoustic measurements.

Purpose of the Study:

  • To determine speech spectra for six different monosyllabic word test materials.
  • To compare these spectra with existing data for continuous speech.
  • To assess the impact of spectral differences on Articulation Index calculations.

Main Methods:

  • Collected digital and audiotape recordings of W-22, NU-6, PB-50, and Maryland CNC word tests.
  • Measured long-term RMS levels and 1% speech peaks in third-octave bands.

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  • Analyzed spectral characteristics and compared them to previous research.

    • Main Results:

    • Speech spectra were generally within 2 standard deviations of previous continuous speech data.
    • Significant differences were observed between the various word test recordings.
    • The relationship between calibration tone and speech varied across recordings, particularly at 1000 Hz.

    Conclusions:

    • Spectral variations among word test recordings can affect Articulation Index accuracy.
    • The choice of speech recording material is important for reliable speech intelligibility measures.
    • Further research may be needed to standardize speech spectra for different test materials.