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Some acoustic evidence for vocal abuse in adult speakers with repaired cleft palate.
Author(s) -
Leder Steven B.,
Lerman Jay W.
Publication year - 1985
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 - 10.1288/00005537-198507000-00017
Subject(s) - stop consonant , audiology , articulatory phonetics , medicine , vocal folds , larynx , population , consonant , phonation , anatomy , vowel , speech recognition , environmental health , computer science
Acoustic evidence for vocal abuse in adult speakers with cleft palate and hypernasality has not been reported. This study was undertaken to determine if there was acoustic evidence of inappropriate vocal fold adduction during stop consonant production in this population. The results indicated that spectrograms of speakers with cleft palate and severe hypernasality exhibited acoustic characteristics different from spectrograms of speakers without cleft palate and speakers with cleft palate and mild hypernasality. Specifically, voiceless stop productions of severe hypernasal speakers resembled voiced stop productions. Their vocal folds were inappropriately adducted to provide a constriction inferior to the inadequately functioning velopharyngeal port to minimize the nasal air leak. The acoustic evidence supports the hypothesis that a cause of vocal abuse in the cleft palate population is due to compensatory laryngeal valving activities secondary to severe hypernasality.