The purpose of this study was to investigate univariate relationships between perceived dysphonia and variation in pitch perturbation, amplitude perturbation, and additive noise. A time‐domain, pitch‐synchronous synthesis technique was used to generate sustained vowels varying in each of the three acoustic dimensions. A panel of trained listeners provided direct magnitude estimates of roughness in the case of the stimuli varying in pitch and amplitude perturbation, and breathiness in the case of the stimuli varying in additive noise. Very strong relationships were found between perceived roughness and either pitch or amplitude perturbation. However, unlike results reported previously for nonspeech stimuli, the subjective quality associated with pitch perturbation was quite different from that associated with amplitude perturbation. Results also showed that perceived roughness was affected not only by the amount of perturbation, but also by the degree of correlation between adjacent pitch or amplitude values. A strong relationship was found between perceived breathiness and signal‐to‐noise ratio. Contrary to previous findings, there was no interaction between signal‐to‐noise ratio and the amount of high‐frequency energy in the periodic component of the stimulus: Stimuli with similar signal‐to‐noise ratios received similar ratings, regardless of differences in the spectral slope of the periodic component.
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June 1988
June 01 1988
Perception of aperiodicities in synthetically generated voices
James Hillenbrand
James Hillenbrand
RIT Research Corporation and Department of Computer Science, Rochester Institute of Technology, 75 Highpower Road, Rochester, New York 14623‐3435
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J. Acoust. Soc. Am. 83, 2361–2371 (1988)
Article history
Received:
December 02 1987
Accepted:
February 15 1988
Citation
James Hillenbrand; Perception of aperiodicities in synthetically generated voices. J. Acoust. Soc. Am. 1 June 1988; 83 (6): 2361–2371. https://doi.org/10.1121/1.396367
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