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Acoustic Properties as Predictors of Perceptual Responses: a Study of Swedish Voiced Stops
Stockholm University, Faculty of Humanities, Department of Linguistics.
1988 (English)Doctoral thesis, monograph (Other academic)
Abstract [en]

In speech recognition algorithms and certain theories of speech perception the interpretation of the signal is based on " distance scores " for comparisons of the signal with stored references; in these theories, perception is seen as a product of stimulus and experience. The aim of the present thesis is to evaluate such distance measures by investigating the perceptual confusions of the Swedish voiced stops [b,d,q,g] in systematically varied fragments of vowel-consonantvowel stimuli providing 25 vowel contexts for each consonant. To what extent can perceptual identifications be accounted for in terms of the acoustic properties of  the stimuli? Short stimulus segments following stop release, chosen to elicit perceptual confusions, constituted the main material for this investigation. The resulting confusions were shown to form a regular pattern depending mainly on the acute/grave dimension of the following vowel. The acoustic distances calculated were based partly on formant frequencies at the consonant-vowel boundary, partly on filter-band spectra. B oth models provided distance measures which revealed regular patterns related in their essentials to the confusions. However, the predictive capacity of both models was improved by including the dynamic properties of the stimuli in the distance measures. The highest correlation between predicted and observed percent confusions, r=.85, was obtained with the fOlmant-based model. The asymmetries in the listeners' confusions were also shown to be predictable given acoustic data on the following vowel and were included in the calculations.

Place, publisher, year, edition, pages
Stockholm: Department of Linguistics, University of Stockholm , 1988. , 149+26 p.
PERILUS, ISSN 0282-6690 ; 7
National Category
General Language Studies and Linguistics
Research subject
URN: urn:nbn:se:su:diva-40213ISBN: 91-7146-493-XOAI: diva2:322908
För att köpa boken skicka en beställning till To order the book send an e-mail to from: 2010-06-08 Created: 2010-06-08 Last updated: 2011-06-07Bibliographically approved

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Krull, Diana
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