有限要素法による声道内音声伝搬のシミュレーション

概要

論文の詳細を見る
A three-dimensional finite element method is applied to investigate the acoustic transmission characteristics of vocal tract. The accuracy of the finite element solutions is assessed by comparing with the exact solutions for an infinitely long rectanglar duct. Using the FE models of vocal tract during pronunciation of vowels, we examine the sound field in vocal tract and the effects of multi-modal propagation due to an interaction of the plane wave mode and the higher order modes in high frequency region. The results of calculation show that the modal interactions become significant at frequencies above 5kHz during pronunciation of vowels /a/, /u/ and /o/, and that some dips appear in the transfer responses of the system due to the multi-modal propagation. It is shown that the traditional equivalent circuit model has a validity only at the frequencies below 5kHz.
社団法人日本音響学会の論文