Impaired perceptual normalization of lexical tones in Cantonese-speaking congenital amusics

Caicai Zhang, Jing Shao, Si Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Human listeners perceive speech sounds relative to acoustic cues in context. In this study the authors examined how congenital amusia, a pitch-processing disorder, affects perceptual normalization of lexical tones according to the distribution of F0 cues in context. Sixteen Cantonese-speaking amusics and 16 controls were tested on the effects of shifting F0 level in four types of contexts on tone perception: nonspeech, reversed speech, semantically anomalous speech, and meaningful speech contexts. Performance of controls replicated previous studies, showing contrastive changes of tone perception according to the shifted F0 level of anomalous and meaningful contexts, which were native speech contexts with phonological cues to estimate a talker's tone space. Effects of nonspeech and reversed contexts were small and inconsistent, and tone perception performance varied depending on the typicality of a talker's F0 range. In contrast to controls, amusics showed reduced context effects in anomalous and meaningful contexts, but largely comparable context effects in nonspeech and reversed contexts, indicating a deficit of amusics in tone normalization through phonological cues in native speech contexts. These findings suggest that the ability to perceive speech sounds relative to acoustic cues in context is not a universal endowment, and that this ability is impaired substantially in amusics.

Original languageEnglish
Pages (from-to)634-647
Number of pages14
JournalJournal of the Acoustical Society of America
Volume144
Issue number2
DOIs
Publication statusPublished - 1 Aug 2018

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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