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Acoustic Characteristics of Voice After Severe Traumatic Brain Injury
Author(s) -
McHenry Monica
Publication year - 2000
Publication title -
the laryngoscope
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.181
H-Index - 148
eISSN - 1531-4995
pISSN - 0023-852X
DOI - 10.1097/00005537-200007000-00017
Subject(s) - audiology , breathy voice , intelligibility (philosophy) , psychology , sentence , medicine , phonation , computer science , artificial intelligence , philosophy , epistemology
Objectives/Hypothesis To describe the acoustic characteristics of voice in individuals with motor speech disorders after traumatic brain injury (TBI). Study Design Prospective study of 100 individuals with TBI based on consecutive referrals for motor speech evaluations. Methods Subjects were audio tape‐recorded while producing sustained vowels and single word and sentence intelligibility tests. Laryngeal airway resistance was estimated, and voice quality was rated perceptually. Results None of the subjects evidenced vocal parameters within normal limits. The most frequently occurring abnormal parameter across subjects was amplitude perturbation, followed by voice turbulence index. Twenty‐three percent of subjects evidenced deviation in all five parameters measured. The perceptual ratings of breathiness were significantly correlated with both the amplitude perturbation quotient and the noise‐to‐harmonics ratio. Conclusions Vocal quality deviation is common in motor speech disorders after TBI and may impact intelligibility.