344 相反定理を用いた移動音源の音響伝達関数補間法の研究

概要

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In this study, the method to predict the sound pressure at the evaluation point Q from the moving source on the line L is proposed. When the sound source is placed on the point Q, a value of transfer function at an arbitrary evaluation point on the line L can be interpolated from the measured values at several points on the line L. By the reciprocity theorem, a transfer function from an arbitrary point on the line L to the evaluation point Q can be obtained. Using the time-varying FIR filter obtained from the interpolated transfer functions, the sound observed at the point Q can be calculated even if the sound source travels on the line L. Additionally, the method to interpolate a transfer function when the sound is diffracted on the upper edge of the noise barrier and reflected by the ground is proposed. Using the impulse responses of measured transfer functions, the interpolated value corresponds well with the obtained value by numerical calculation.
一般社団法人日本機械学会の論文
2005-08-22