Modeling the effect of palate shape on the articulatory-acoustics mapping

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" Modeling the effect of palate shape on the articulatory-acoustics mapping "
Bakst, Sarah; Johnson, Keith

Document Type	:	AL
Record Number	:	934732
Doc. No	:	LA7g2174g1
Language of Document	:	English
Main Entry	:	Bakst, Sarah; Johnson, Keith
Title & Author	:	Modeling the effect of palate shape on the articulatory-acoustics mapping [Article]\ Bakst, Sarah; Johnson, Keith
Title of Periodical	:	UC Berkeley PhonLab Annual Report
Volume/ Issue Number	:	12
Date	:	2016
Abstract	:	Previous research [1, 2] shows that articulatory variability is reduced for people with flatter palates. It has been hypothesized [1] that this is because the mapping between articulation and acoustics is more linear for flatter than for more domed palates. A combination of two synthesizers were used to model how vocal tract anatomy influences the mapping of articulation onto acoustics, using American English /r/ as a test case. A retroflexable tongue tip was added to the articulatory parameters. Two additional palate shapes and a sublingual cavity that appears during /r/ production were also added to the synthesizer. A Python script searched the articulatory-acoustic space for vocal tract configurations that resulted in a low F3 (the hallmark acoustic cue for /r/) for each palate. Palate shape influences not only the overall sensitivity of the articulatory-acoustic mapping, but also the effect of each individual articulatory parameter on F3.