Perception of lateral misarticulation and its physical correlates

Citation
M. Akagi et al., Perception of lateral misarticulation and its physical correlates, FOLIA PHON, 53(6), 2001, pp. 291-307
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Rehabilitation
Journal title
FOLIA PHONIATRICA ET LOGOPAEDICA
ISSN journal
1021-7762 → ACNP
Volume
53
Issue
6
Year of publication
2001
Pages
291 - 307
Database
ISI
SICI code
1021-7762(200111/12)53:6<291:POLMAI>2.0.ZU;2-V
Abstract
In order to clarify the relationship between perceptual diagnosis of latera l misarticulation (LM) by sophisticated listeners and the physical correlat es of LM, three experiments using sustained speech /integral/ were conducte d. Experiment 1 was designed to compare the spectral envelopes of normal sp eech (NS) /integral/ with those of LM /integral/. Experiment 2 was designed to collect the auditory impressions of sophisticated listeners listening t o LM and NS /integral/ with specific spectral envelope bands replaced by LM . These two experiments showed that: (1) the spectral envelopes of LM are f lat or decrease along the frequency axis in the frequency band above approx imately 4 kHz, and there is a substantial peak at around 3.2 kHz in LM, whi ch varies peculiarly with time; (2) the replacement of the spectral envelop e between 2.5 and 4.5 kHz of NS with that of LM resulted in a remarkable in crease in auditory impressions of LM. The facts suggest that the spectral e nvelope characteristic of LM has a peculiar variation at around 3.2 kHz. Ad ditionally, experiment 3 estimated the spectrum of sustained speech /integr al/ using vocal tract area functions. The results suggest that typical peak s of LM are related to the length and position of the vocal tract constrict ion region. Copyright (C) 2001 S. Karger AG, Basel.