title: Perception of lateral misarticulation and its physical correlates.
abstract: In order to clarify the relationship between perceptual diagnosis of lateral misarticulation (LM) by sophisticated listeners and the physical correlates of LM, three experiments using sustained speech /integral/ were conducted. Experiment 1 was designed to compare the spectral envelopes of normal speech (NS) /integral/ with those of LM /integral/. Experiment 2 was designed to collect the auditory impressions of sophisticated listeners listening to LM and NS /integral/ with specific spectral envelope bands replaced by LM. These two experiments showed that: (1) the spectral envelopes of LM are flat or decrease along the frequency axis in the frequency band above approximately 4 kHz, and there is a substantial peak at around 3.2 kHz in LM, which varies peculiarly with time; (2) the replacement of the spectral envelope between 2.5 and 4.5 kHz of NS with that of LM resulted in a remarkable increase in auditory impressions of LM. The facts suggest that the spectral envelope characteristic of LM has a peculiar variation at around 3.2 kHz. Additionally, experiment 3 estimated the spectrum of sustained speech /integral/ using vocal tract area functions. The results suggest that typical peaks of LM are related to the length and position of the vocal tract constriction region.
authors.affiliation: School of Information Science, Japan Advanced Institute of Science and Technology, Ishikawa, Japan. akagi@jaist.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Akagi
authors.forename: N
authors.initials: N
authors.lastname: Suzuki
authors.forename: K
authors.initials: K
authors.lastname: Hayashi
authors.forename: H
authors.initials: H
authors.lastname: Saito
authors.forename: K I
authors.initials: KI
authors.lastname: Michi
mesh_terms: D000328:Adult; D001184:Articulation Disorders / Q000175:diagnosis* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007600:Judgment; D010700:Phonetics; D013067:Speech Perception; D013068:Speech Production Measurement