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Related Experiment Videos

Acceptability for temporal modification of consecutive segments in isolated words

H Kato1, M Tsuzaki, Y Sagisaka

  • 1ATR Human Information Processing Research Laboratories, Kyoto, Japan. kato@hip.atr.co.jp

The Journal of the Acoustical Society of America
|April 1, 1997
PubMed
Summary

Perceptual sensitivity to speech timing is wider than single sounds. Loudness jumps, not order, signal important temporal markers in speech perception.

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Area of Science:

  • Speech Perception
  • Auditory Neuroscience
  • Psychoacoustics

Background:

  • Understanding speech perception involves analyzing how listeners process temporal information within speech segments.
  • Investigating interactions between segmental durations and identifying salient temporal markers is crucial for speech processing models.

Purpose of the Study:

  • To explore interactions between multiple segmental durations in speech.
  • To determine what aspects of stimulus context define perceptually salient temporal markers.
  • To examine the influence of temporal order and loudness variations on speech perception.

Main Methods:

  • Experiment 1: Assessed word acceptability with temporal modifications in vowel (V) and consonant (C) segments.
  • Experiment 2: Used a detection task on non-speech stimuli to replicate findings on temporal modifications.

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  • Experiment 3: Employed a detection task on speech stimuli to further investigate temporal order effects.

    • Main Results:

    • Compensatory duration changes between vowels and consonants are less salient than anticipated, suggesting a wider perceptual time range.
    • Speech acceptability ratings depend more on loudness differences between segments than on the temporal order (VC vs. CV).
    • Perceptually salient temporal markers appear to be associated with significant loudness jumps.

    Conclusions:

    • Speech perception integrates temporal information across broader segments than individual vowels or consonants.
    • Loudness variations, particularly significant jumps, play a critical role in identifying perceptually important temporal cues in speech.
    • The findings contribute to understanding the complex interplay of timing and intensity in auditory processing.