Now showing items 1-11 of 11

    • Say again? Individual acoustic strategies for producing a clearly-spoken minimal pair wordlist 

      Scobbie, James M.; Ma, Joan K-Y (International Phonetic Association, 2019-08-10)
      People make their speech clearer in difficult conversational contexts using global mechanisms (e.g. “Lombard Speech”) and by targeted enhancements of linguistic constituents (“hyperspeech”). We describe production changes ...
    • Say again? Individual articulatory strategies for producing a clearly-spoken minimal pair wordlist 

      Scobbie, James M.; Ma, Joan K-Y (International Phonetic Association, 2019-08-10)
      We describe articulatory differences (lingual and labial) between two versions (neutral and clear) of a CVC wordlist of 12 targets (V = /ieaɔoʉ/; C_C = /p_p/ or /m_m/). A companion paper describes the background; the ...
    • Speech Prosody Across Stimulus Types for Individuals with Parkinson's Disease 

      Ma, Joan K-Y; Schneider, Christine B.; Hoffmann, Rüdiger; Storch, Alexander (IOS Press, 2015)
      Up to 89% of the individuals with Parkinson's disease (PD) experience speech problem over the course of the disease. Speech prosody and intelligibility are two of the most affected areas in hypokinetic dysarthria. However, ...
    • Motor speech disorders in Chinese 

      Whitehill, Tara L.; Ma, Joan K-Y (Multilingual Matters, 2014-07-21)
      Chinese, spoken by approximately 20% of the world’s population, is the most commonly spoken language in the world (Fung, 1990). There is some debate regarding whether varieties of spoken Chinese should be considered dialects ...
    • The tongue and lips in Lombard speech: A pilot study of vowel-space expansion 

      Scobbie, James M.; Ma, Joan K-Y; White, Joanna D. (2012-09)
      We investigate some ways in which speech production alters to make speech sounds more intelligible to a listener. This single speaker pilot study uses ultrasound tongue imaging and videos of lips to investigate the underlying ...
    • The perception of intonation questions and statements in Cantonese 

      Ma, Joan K-Y; Ciocca, Valter; Whitehill, Tara L. (2011)
      In tone languages there are potential conflicts in the perception of lexical tone and intonation, as both depend mainly on the differences in fundamental frequency (F0) patterns. The present study investigated the acoustic ...
    • Dysprosody and stimulus effects in Cantonese speakers with Parkinson's disease 

      Ma, Joan K-Y; Whitehill, Tara L.; Cheung, Katherine S-K (Taylor & Francis (Informa Healthcare), 2010)
      Background: Dysprosody is a common feature in speakers with hypokinetic dysarthria. However, speech prosody varies across different types of speech materials. This raises the question of what is the most appropriate ...
    • Intonation Contrast in Cantonese Speakers With Hypokinetic Dysarthria Associated With Parkinson's Disease 

      Ma, Joan K-Y; Whitehill, Tara L.; So, Susanne Y-S (2010)
      Purpose: Speech produced by individuals with hypokinetic dysarthria associated with Parkinson's disease (PD) is characterized by a number of features including impaired speech prosody. The purpose of this study was to ...
    • Effect of intonation on Cantonese lexical tones 

      Ma, Joan K-Y; Ciocca, Valter; Whitehill, Tara L. (2006)
      In tonal languages, there are potential conflicts between the F0-based changes due to the coexistence of intonation and lexical tones. In the present study, the interaction of tone and intonation in Cantonese was examined ...
    • The Impact of Cerebral Palsy on the Intelligibility of Pitch-based Linguistic Contrasts 

      Ciocca, Valter; Whitehill, Tara L.; Ma, Joan K-Y (2004)
      This study investigated the perception of three Cantonese level tones produced by speakers with dysarthria associated with cerebral palsy. Four speakers with dysarthria were selected on the basis of their distinctive ...
    • Perceptual characteristics of Cantonese hypokinetic dysarthria 

      Whitehill, Tara L.; Ma, Joan K-Y; Lee, Alice (2003)
      The aims of this study were to provide a perceptual speech 'profile' for Cantonese speakers with hypokinetic dysarthria, to examine the reliability of non-expert listeners in perceptual judgements of dysarthric speech, and ...