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Spectral fissioning in phonemic transformations

M H Chalikia1, R M Warren

  • 1University of Wisconsin-Milwaukee 53201.

Perception & Psychophysics
|February 1, 1994
PubMed
Summary
This summary is machine-generated.

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Listeners perceive two simultaneous speech utterances from repeated vowels. Separate spectral regions, below and above 1500 Hz, are used for each distinct verbal organization, demonstrating spectral fission in auditory perception.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Speech processing

Background:

  • Repeated steady-state vowels can lead to phonemic transformations.
  • Listeners perceive two simultaneous utterances with different phonemic content and timbre.

Purpose of the Study:

  • To determine if two perceived utterances stem from alternative interpretations of the same formant structures.
  • To investigate if different spectral portions of vowels are used for distinct verbal organizations.

Main Methods:

  • Presentation of repeated brief steady-state vowels.
  • Analysis of spectral regions used for verbal organization.
  • Utilizing a contralateral induction paradigm to evaluate spectral fission and fusion.

Main Results:

Related Experiment Videos

  • Separate spectral regions are employed for each perceived verbal form.
  • Components below 1500 Hz were used for one form, and components above 1500 Hz for the other.
  • The tendency for separate spectral organization can overcome integration into a single auditory image.

Conclusions:

  • Auditory system utilizes distinct spectral regions for organizing simultaneous speech percepts.
  • Spectral fission, the splitting of auditory information into separate frequency bands, plays a role in speech perception.
  • Competing tendencies of spectral fission and fusion influence auditory image formation.