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All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year AND OR AND NOT All fields Title Creator / Publisher Keyword Year Sort by creator [A → Z]' creator [Z → A]' publishing year ↑ (asc)' publishing year ↓ (desc)' title [A → Z]' title [Z → A]' Simple Search Hits 1 – 10 of 10 1 Speech amplification devices for hypophonia (Knowles et al., 2020) ... Knowles, Thea; Adams, Scott G.; Page, Allyson. - : ASHA journals, 2020 BASE Show details 2 Speech amplification devices for hypophonia (Knowles et al., 2020) ... Knowles, Thea; Adams, Scott G.; Page, Allyson. - : ASHA journals, 2020 BASE Show details 3 Structured heterogeneity in Scottish stops over the 20th Century Stuart-Smith, Jane; Knowles, Thea; Macdonald, Rachel. - : Linguistic Society of America, 2020 BASE Show details 4 Changes in speech intelligibility and acoustic distinctiveness along a speech rate continuum in Parkinson’s disease Knowles, Thea In: Electronic Thesis and Dissertation Repository (2019) BASE Show details 5 STN-DBS parameter optimization for speech in PD (Knowles et al., 2018) ... Knowles, Thea; Adams, Scott; Abeyesekera, Anita. - : Figshare, 2018 BASE Show details 6 STN-DBS parameter optimization for speech in PD (Knowles et al., 2018) ... Knowles, Thea; Adams, Scott; Abeyesekera, Anita. - : Figshare, 2018 BASE Show details 7 Automatic analysis of child speech (Knowles et al., 2018) ... Knowles, Thea; Clayards, Meghan; Sonderegger, Morgan. - : ASHA journals, 2018 BASE Show details 8 Automatic analysis of child speech (Knowles et al., 2018) ... Knowles, Thea; Clayards, Meghan; Sonderegger, Morgan. - : ASHA journals, 2018 BASE Show details 9 Effects of Multi-talker Noise on the Acoustics of Voiceless Stop Consonants in Parkinson's Disease Jog, Mandar; Adams, Scott; Cushnie-Sparrow, Daryn; Leszcz, Talia M; Knowles, Thea In: Western Papers in Linguistics / Cahiers linguistiques de Western (2016) Abstract: This study examined the effect of increased speech intensity on stop consonant acoustics in Parkinson’s disease (PD). Acoustic analyses focused on measures of spirantization, voicing during closure, stop closure durations, and voice onset time. Ten individuals with Parkinson’s disease and ten age-matched controls were audio recorded while they read aloud words from the Distinctive Features Differences Test (DFD) during two conditions: no noise and 65 dB of multi-talker background noise. When compared to controls, the participants with PD had values that approached a significant difference for the measures related to greater percent voicing into closure (p=0.074), lower mean syllable intensity (p=0.069) and greater spirantization ratio (p=0.094). When compared to the no noise condition, the 65 dB multi-talker noise condition was associated with significant changes in voice onset time (VOT), syllable intensity, spirantization ratio and other measures. In addition, the place of stop consonant production had a significant effect on measures of closure duration, VOT, spectral skewness and other measures. These preliminary findings suggest that additional studies of the effect of changes in speech intensity on stop production in PD are warranted. The results of the present study identified several acoustic measures of stop production that may be useful in future evaluations of treatment outcome in PD. Keyword: multi-talker noise; Parkinson's disease; spectral moments; spirantization; stops; voice onset time URL: https://ir.lib.uwo.ca/wpl_clw/vol3/iss1/2 BASE Hide details 10 Didja know? A comparative study of affrication across word boundaries in Canadian and American English Knowles, Thea; Little, Carol. - 2013 BASE Show details

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