Abstract

The relation between auditory acuity, somatosensory acuity and the magnitude of produced sibilant contrast was investigated with data from 18 participants. To measure auditory acuity, stimuli from a synthetic sibilant continuum ([s]-[ʃ]) were used in a four-interval, two-alternative forced choice adaptive-staircase discrimination task. To measure somatosensory acuity, small plastic domes with grooves of different spacing were pressed against each participant's tongue tip and the participant was asked to identify one of four possible orientations of the grooves. Sibilant contrast magnitudes were estimated from productions of the words "said," "shed," "sid," and "shid." Multiple linear regression revealed a significant relation indicating that a combination of somatosensory and auditory acuity measures predicts produced acoustic contrast. When the participants were divided into high- and low-acuity groups based on their median somatosensory and auditory acuity measures, separate ANOVA analyses with sibilant contrast as the dependent variable yielded a significant main effect for each acuity group. These results provide evidence that sibilant productions have auditory as well as somatosensory goals and are consistent with prior results and the theoretical framework underlying the DIVA model of speech production.

Notes

The following article appeared in J. Acoust. Soc. Am. Volume 128, Issue 5, pp. 3079-3087 (November 2010) and may be found at DOI:10.1121/1.3493430

Keywords

auditory acuity, somatosensory acuity, sibilants

Subject Categories

Hearing, Speech, Intelligibility of Speech

Disciplines

Psychology | Speech and Hearing Science

Publisher

Acoustical Society of America

Publication Date

11-1-2010

Rights Information

This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

Rights Holder

©2010 Acoustical Society of America

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