CUL-DE-SAC HYPERNASALITY TEST WITH PATTERN-RECOGNITION OF LPC INDEXES

Citation
Ml. Haapanen et al., CUL-DE-SAC HYPERNASALITY TEST WITH PATTERN-RECOGNITION OF LPC INDEXES, Folia phoniatrica et logopaedica, 48(1), 1996, pp. 35-43
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Rehabilitation
ISSN journal
1021-7762
Volume
48
Issue
1
Year of publication
1996
Pages
35 - 43
Database
ISI
SICI code
1021-7762(1996)48:1<35:CHTWPO>2.0.ZU;2-8
Abstract
Acoustic differences between samples of [i], [u], and [a] uttered in n ose-open and nose-obstructed condition were studied in 6 women with is olated cleft palate and pathological nasalance scores and 9 healthy wo men with normal nasalance scores. The speech samples were depicted by 14-component vocal tract area feature vectors obtained by linear predi ction and the differences between the samples were studied with a self -organized feature map. Each location on the map corresponds to a cert ain signal pattern, neighboring locations to similar patterns. The gro up of healthy subjects differed from the patients for the vowels [i] a nd [u] but Dot for [a]. In the patients the nose obstruction induced a significant change in the location of these vowel samples on the map. In healthy subjects no such changes were detected. The result agreed with perceived differences between the subjects.