Noise barrier for a building facade

概要

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The transfer function and the impulse response of an acoustical barrier in front of a large building facade were calculated. The sound field prediction around the barrier was based on the Kirchhoff-Rubinowicz theory, where the velocity potential on the back of a barrier was treated as zero, and then its inverse Fourier transform was calculated as and the ground, were calaulated only for specular reflections of deffracted waves which were born at the edges of the barrier. For damping of these multiple reflections, absorbing material was lined on the back of barrier and the ground. These calculation methods were compared with the scale model experiments in the time domain giving good agreements. The diffiraction in the back of a barrier became more intutive being expressed in the time domain.
社団法人日本音響学会の論文