An investigation of the relation between sibilant production and somatosensory and auditory acuity

Satrajit S. Ghosh, Melanie L. Matthies, Edwin Maas, Alexandra Hanson, Mark Tiede, Lucie Ḿnard, Frank H. Guenther, Harlan Lane, Joseph S. Perkell

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


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] - [∫]) 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.

Original languageEnglish (US)
Pages (from-to)3079-3087
Number of pages9
JournalJournal of the Acoustical Society of America
Issue number5
StatePublished - Nov 2010

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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