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Findings indicated that those with ADSD produced a greater frequency of aberrant acoustic events than the controls during both tasks. For the group with ADSD, the amount and type of each event also varied with utterance type. The sustained vowel sample produced by those with ADSD consisted of a greater percentage of aperiodic segments followed by phonatory breaks and frequency shifts. During reading, frequency shifts were the predominant acoustic event, followed by phonatory breaks and aperiodicity. The advantage of segmenting the acoustic waveform into these measures and the relevancy of examining intertask performances by those with ADSD is discussed.<\/jats:p>","DOI":"10.1044\/jslhr.4201.127","type":"journal-article","created":{"date-parts":[[2014,7,29]],"date-time":"2014-07-29T21:09:55Z","timestamp":1406668195000},"page":"127-140","source":"Crossref","is-referenced-by-count":45,"title":["Acoustic Variations in Adductor Spasmodic Dysphonia as a Function of Speech Task"],"prefix":"10.1044","volume":"42","author":[{"given":"Christine M.","family":"Sapienza","sequence":"first","affiliation":[{"name":"University of Florida Gainesville"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Suzanne","family":"Walton","sequence":"additional","affiliation":[{"name":"University of Florida Gainesville"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Murry","sequence":"additional","affiliation":[{"name":"University of Pittsburgh Pittsburgh, PA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1310","reference":[{"key":"e_1_3_1_2_1","first-page":"171","article-title":"Unilateral versus bilateral botulinum toxin injections in spasmodic dysphonia: Acoustic and perceptual results","volume":"22","author":"Adams S. 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