A Hierarchical Model of Speech and Voice Perception Based on Time Resolution
نویسنده
چکیده
The theoretical model presented aims primarily at explaining the large variability encountered in speech analysis. It implements a joint processing of speech and voice, and a hierarchy of 6 levels based on time resolution: cochlear output, acoustical indices, phonetic features, phonemes, words, concepts. Perception is viewed as the cooperation of two information flows, bottom-up and top-down. The hierarchy employs processing modules of the same type, one between any pair of adjacent levels. The function of the module is to associate two time-varying patterns. Then each processing step is presented, with its specific units and its time characteristics. Finally some phonetic notions and problems are examined in the light of the model: pitch, formants, vowel normalization, motor theory, relations between voice and speech.
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