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Auditory-perceptual interpretation of the vowel
1Central Institute for the Deaf, St. Louis, Missouri 63110.
The Journal of the Acoustical Society of America
|May 1, 1989
Summary
This study introduces an auditory-perceptual space (APS) model to categorize American English vowels based on acoustic waveforms. The APS model accurately segregates vowel sounds, offering insights into phonetic recognition.
Area of Science:
- Phonetics and Acoustics
- Auditory Perception
- Speech Recognition
Background:
- Traditional formant-ratio theory for vowel description has limitations.
- Existing frequency scales for vowel analysis require further examination.
- Understanding the acoustic basis of perceived vowel categories is crucial for speech technology.
Purpose of the Study:
- To present and discuss issues in relating acoustic waveforms to perceived vowel categories.
- To introduce the author's auditory-perceptual theory of phonetic recognition.
- To propose a novel three-dimensional auditory-perceptual space (APS) for vowel representation.
Main Methods:
- Historical review of formant-ratio theory and analysis of proposed frequency scales.
- Representation of American English monophthongal vowels within a 3D APS.
- Development and testing of perceptual target zones within the APS for vowel segregation.
Main Results:
- Monophthongal American English vowels cluster into perceptual target zones within the APS.
- Preliminary APS target zones achieve 93% accuracy in segregating a vowel corpus.
- Vowel descriptions in the APS correlate with articulation and timbre dimensions.
Conclusions:
- The proposed APS provides a robust framework for understanding vowel perception.
- The APS model effectively categorizes vowels, accounting for variations like retroflexion and rounding.
- Further research should address talker normalization, coarticulation, and other phonetic complexities within the APS.
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