Measurement of radiation characteristics using replicas of the lips.
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概要
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The radiation characteristics at the lips are measured by using plaster replicas maintaining actual lip shapes under several articulatory conditions for vowels. The experimental results are represented in terms of reflection coefficients of volume velocity to facilitate interpretation in physical conditions. It is shown that the measured data are different from theoretical values of a circular piston model both in amplitude and in phase characteristics. We then present a radiation model approximating experimental results under the assumption of plane wave propagation, which is a highly simplified model but has sufficient approximation accuracy. By use of the proposed radiation model, we can determine the equivalent radiating plane, and can consequently remove ambiguity of vocal-tract length due to uncertainty of the radiating region for actual lips.
- 一般社団法人 日本音響学会の論文
一般社団法人 日本音響学会 | 論文
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