Transglottal airflow measures in continuous speech and

syllable repetition for subjects with vocal paralysis and normal subjects

By J.A. Till and R.L. Crumley

 

Mean airflow values obtained during syllable repetition and monologue speaking were compared in 27 subjects with laryngeal paralysis and a control group of normal speaking adults matched for sex and age.  The results showed no significant difference in mean airflow between the syllable repetition and monologue tasks for the normal group.  However, mean airflow for the paralysis group was significantly higher in syllable repetition compared to monologue.  An additional investigation of mean subglottal driving pressure in the syllable repetition task showed that the vocal paralysis group had elevated subglottal driving pressure relative to the normal speaking group.  An experimentally adjusted mean airflow estimate for syllable repetition was calculated for each disordered subject using their original observed laryngeal airway resistance and subglottal driving pressure that was reduced to the mean observed in the normally speaking group.  Statistical comparisons based on the newly created artificial airflow data showed no difference in mean airflow between the syllable repetition and monologue task. Implications of the results for increased control of the syllable repetition task during clinical assessment will be discussed.