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(51)¡¡Three-dimensional acoustic field in vocal-tract
¡¡¡¡¡¡¡¡Acoustical Science and Technology, Vol.23, No.4, pp.207-212, 2002-7

¡¡Recent developments in observation techniques such as magnetic resonance imaging allow us to obtain an accurate description of the vocal-tract shape. It is thus possible to perform analyses of the acoustic characteristics of three-dimensional vocal-tracts at higher frequencies where the assumption of plane wave propagation does not hold. Historical and conventional one-dimensional models of vocal-tracts are briefly described followed by recent knowledge of the acousticcharacteristics of three-dimensional vocal-tracts.
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