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Forty-two healthy adults participated in a perceptual study involving pair-comparisons of the magnitude of \u201cshakiness\u201d with simulated samples of laryngeal vocal tremor. Results revealed that listeners perceived a higher magnitude of voice modulation when simulated samples had a higher mean F0, greater degree of vocal fold adduction, and vocal tract shape for \/i\/ vs \/\u0251\/. However, the effect of F0 was significant only when glottal noise was not present in the acoustic signal. Acoustical analyses were performed with the simulated samples to determine the features that affected listeners' judgments. Based on regression analyses, listeners' judgments were predicted to some extent by modulation information present in both low and high frequency bands.<\/jats:p>","DOI":"10.1121\/1.4927561","type":"journal-article","created":{"date-parts":[[2015,8,18]],"date-time":"2015-08-18T17:01:16Z","timestamp":1439917276000},"page":"953-963","update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":9,"title":["The effects of physiological adjustments on the perceptual and acoustical characteristics of simulated laryngeal vocal tremor"],"prefix":"10.1121","volume":"138","author":[{"given":"Rosemary A.","family":"Lester","sequence":"first","affiliation":[{"name":"University of Arizona Department of Speech, Language, and Hearing Sciences, , Tucson, Arizona 85721, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brad H.","family":"Story","sequence":"additional","affiliation":[{"name":"University of Arizona Department of Speech, Language, and Hearing Sciences, , Tucson, Arizona 85721, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"231","published-online":{"date-parts":[[2015,8,18]]},"reference":[{"issue":"9","key":"2023080103072509500_c1","doi-asserted-by":"publisher","first-page":"1416","DOI":"10.1001\/archneur.61.9.1416","article-title":"Botulinum toxin type A for treating voice tremor","volume":"61","year":"2004","journal-title":"Arch. 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