This investigation compared five parameters of phonatory function in an examination of the use of acoustic measures in differential diagnosis in 39 subjects in 3 neuropathological groups (Parkinson, Huntington, cerebellar ataxia) and a normal control group. Results indicated higher variability in perturbation in all the neuropathological groups.…

This study evaluated the voiced/voiceless phonation time for /s/ and /z/ for 11 children (ages 5-10) with vocal pathology and 11 normal speaking children. Results showed no difference in /s/ durations between groups, but /z/ durations and s/z ratios were significantly different. Results are discussed in relation to task construction, instructional…