Multi-User Real-Time Speech Processing Facility.
Final rept. 1 Jun 83-31 Aug 84,
INDIANA UNIV AT BLOOMINGTON DEPT OF PSYCHOLOGY
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Research projects requiring the VAX 11750 and related peripherals have all focused on speech analysis, perception and recognition. We compared perceptual confusions occurring for natural and synthetic speech syllables which showed that synthetic speech is not equivalent to noisy or degraded natural speech. We conducted a study that indicated that perception of synthetic speech is improved by training. Training with fluent synthetic sentences improves performance for both isolated words and sentences. Training with isolated words improves performance on isolated words but does not improve performance on fluent synthetic sentences. A large-scale series of experiments investigated the effects of noise in a talkers ears on speech production. Words produced in noise are longer, louder and higher in pitch than words produced in the quiet. The tilt of the power spectrum decreased and formant frequencies shifted in noise. Further projects in preparation include detailed acoustic-phonetic and multi-dimensional analyses of speech produced under conditions of noise, stress and acceleration and additional research on perceptual and cognitive constraints imposed on the listener when listening to synthetic speech is continuing as well. Keywords Speech, synthesis, analysis, perception, recognition, IO, human factors, cognitive processes, and communication sciences.
- Human Factors Engineering and Man Machine Systems
- Voice Communications