Discrimination of fundamental frequency contours in synthetic speech: implications for models of pitch perception
作者:
Dennis H. Klatt,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1973)
卷期:
Volume 53,
issue 1
页码: 8-16
ISSN:0001-4966
年代: 1973
DOI:10.1121/1.1913333
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The just‐noticeable difference (JND) for selected aspects of voice fundamental frequency (F0) contours was determined by varying theF0control parameter of a digitally simulated terminal analog speech synthesizer. Data were obtained from three subjects for a number of 250‐msec segments of the synthetic vowel /ɛ/ differing only in fundamental frequency. Results indicate that the subjects can detect a change of 0.3 Hz in a constantF0contour whenF0= 120 Hz, but the JND is an order of magnitude larger (2.0 Hz) when theF0contour is a linear descending ramp (32 Hz/sec). Sensitivity to rate of change ofF0in linear ramps is surprisingly good; greatest sensitivity occurs when one ramp increases and the other decreases (JND = 12 Hz/sec). High‐pass filtering of the stimuli improves performance slightly, suggesting that the fundamental component is not involved in the detection of changes inF0. Substitution of the synthetic stimulus /ya/ with its dynamic formant contours in place of /ɛ/ degrades performance only very slightly. Implications of these data for models of pitch perception mechanisms are discussed.
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