Unequal effects of speech and nonspeech contexts on the perceptual normalization of Cantonese level tones
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摘要Context is important for recovering language information from talker-induced variability in acoustic signals. In tone perception, previous studies reported similar effects of speech and nonspeech contexts in Mandarin, supporting a general perceptual mechanism underlying tone normalization. However, no supportive evidence was obtained in Cantonese, also a tone language. Moreover, no study has compared speech and nonspeech contexts in the multi-talker condition, which is essential for exploring the normalization mechanism of inter-talker variability in speaking F0. The other question is whether a talker's full F0 range and mean F0 equally facilitate normalization. To answer these questions, this study examines the effects of four context conditions (speech/nonspeech x F0 contour/mean F0) in the multi-talker condition in Cantonese. Results show that raising and lowering the F0 of speech contexts change the perception of identical stimuli from mid level tone to low and high level tone, whereas nonspeech contexts only mildly increase the identification preference. It supports the speech-specific mechanism of tone normalization. Moreover, speech context with flattened F0 trajectory, which neutralizes cues of a talker's full F0 range, fails to facilitate normalization in some conditions, implying that a talker's mean F0 is less efficient for minimizing talker-induced lexical ambiguity in tone perception. (C) 2012 Acoustical Society of America. [http://dx.doi.org/10.1121/1.4731470]
著者Zhang CC, Peng G, Wang WSY
期刊名稱Journal of the Acoustical Society of America
出版年份2012
月份8
日期1
卷號132
期次2
出版社Acoustical Society of America / Nature Publishing Group
頁次1088 - 1099
國際標準期刊號0001-4966
電子國際標準期刊號1520-8524
語言英式英語
Web of Science 學科類別Acoustics; ACOUSTICS; Audiology & Speech-Language Pathology; AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY

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