An Acoustic Analysis on Vowel Formant Variation of Female with Amyotrophic Lateral Sclerosis
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چکیده
The aim of the present study was to analyzed vowel and diphthong formant variation of a female patient diagnosed with amyotrophic lateral sclerosis (ALS) for 12 months using acoustic analysis. Monophthongs /a, i, u/ and diphthongs /h+ja+da/, /h+wi+da/, /h+ɰi+da/ were used for test. As the result of analysis, fundamental frequency and loudness declined with the progress of ALS characterized by decrease in the gradient of diphthong formant rather than change in monophthong formant. This result implies that vowel distortion of ALS with the progress is caused by decrease in coordination between tongue and chin.
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تاریخ انتشار 2016