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Related Experiment Videos

Variable speech control vs Varispeech: does newer mean better?

J F Schmitt1, S W Moore, N J Lass

  • 1Department of Communicative Disorders, University of Alabama, Tuscaloosa 35487.

The Journal of Auditory Research
|July 1, 1986
PubMed
Summary
This summary is machine-generated.

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The Lexicon Varispeech (VSp) and Variable Speech Control (VSC) Model A-7 offer similar speech intelligibility. However, VSp provides significantly better signal clarity at altered speeds (60% and 140%).

Area of Science:

  • Speech Processing
  • Auditory Perception
  • Acoustics

Background:

  • Evaluating speech processing technologies is crucial for auditory research.
  • The Lexicon Varispeech (VSp) is widely used but obsolescent.
  • Variable Speech Control (VSC) Model A-7 is a commercially available alternative.

Purpose of the Study:

  • To compare the performance of VSp and VSC Model A-7 in speech intelligibility and clarity.
  • To assess the impact of time alteration (compression and expansion) on speech perception.
  • To determine the suitability of these devices for auditory research.

Main Methods:

  • Thirty normal-hearing volunteers (aged 19-28) participated.
  • Intelligibility was measured using W-22 word lists and CID sentences.

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  • Signal clarity was judged on a 7-point scale for Fairbanks' "Rainbow Passage" at normal, 60% compression, and 140% expansion speeds.

    • Main Results:

    • Both VSp and VSC achieved near-perfect intelligibility across all tested speeds.
    • VSp demonstrated significantly superior signal clarity compared to VSC at both 60% compression (p < .01) and 140% expansion (p < .01).
    • VSC's operational range is limited to 60-140%, unlike VSp.

    Conclusions:

    • Both VSp and VSC are suitable for speech intelligibility studies.
    • VSp offers superior signal clarity for time-altered speech, particularly at extreme speeds.
    • The limited range of VSC may restrict its use in certain speech research applications.