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The amount of spectral energy in the 1 to 5 KHz range and above 5 KHz was sufficient to differentiate two subgroups of patients and their main patterns of reorganization of phonatory function. One subgroup showed a voice quality compound of breathy and tense, which gradually normalised in the follow\u2010up period, whereas the other one initially exhibited a normal or lax, breathy voice, which subsequently became more tense. The variance of spectral energy and the duration of aspiration preceding voice onset additionally indicated signs of tense and breathy voice production. Furthermore, the fundamental period perturbation showed that roughness is a less important feature of dysphonia after severe closed head trauma.<\/jats:p>","DOI":"10.3109\/13682828409029840","type":"journal-article","created":{"date-parts":[[2007,11,18]],"date-time":"2007-11-18T01:18:42Z","timestamp":1195348722000},"page":"253-261","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Acoustic measurement of voice quality in dysphonia after severe closed head trauma: A follow\u2010up study"],"prefix":"10.1111","volume":"19","author":[{"given":"E.","family":"Hartmann","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D.","family":"von Cramon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,3,24]]},"reference":[{"key":"e_1_2_1_2_1","volume-title":"Fundamental Problems in Phonetics","author":"CATFORD J. 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