SOUNDPROOF BUILDING DESIGN SUPPORTING METHOD AND SOUNDPROOF BUILDING DESIGN SUPPORTING DEVICE

To provide a soundproof building design supporting method and a soundproof building design supporting device in which, at a stage of designing a soundproof building, vibration based on a dynamic characteristic of a vibration producing machine and a measured value of a sound generated with the vibration can be used to predict a sound to propagate from the vibration producing machine to the surrounding area, and the predicted sound is used as a design element of the soundproof building so as to assist in appropriately designing the soundproof building.SOLUTION: A sound pressure measurement device 13 that is disposed near a vibration sieve 1 that generates a sound through directional periodic vibration, is used to measure the sound pressure emitted due to the vibration. A vibration acceleration measurement device 11 that is provided to the vibration sieve is used to measure the vibration acceleration of the vibration sieve. By means of a computation device 14, a computation process is performed by a differential time domain method using the measured value of the sound pressure and the measured value of the vibration acceleration, and a predicted value of a sound pressure that is predicted to propagate from the position of the vibration sieve as a starting point to a coordinate position in a 3D space with the elapse of time, is acquired as a design element of the soundproof building.SELECTED DRAWING: Figure 1 【課題】防音建屋の設計段階で、起振機械の動特性に基づく振動及び当該振動に伴って生じる音の実測値を利用して、起振機械から周囲へ伝搬していく音を予測することが可能で、予測された音を防音建屋の設計要素として利用して、的確な防音建屋の設計に資する防音建屋の設計支援方法及び設計支援装置を提供する。【解決手段】指向性のある周期的な振動に伴って音を発生する振動ふるい機１の近傍に設けた音圧測定器１３を用いて、振動に起因して放出される音圧を実測し、振動ふるい機に設けた振動加速度測定器１１を用いて、振動ふるい機の振動加速度を実測し、演算装置１４により、これら音圧及び振動加速度の実測値を用いる時間領域差分法で演算処理し、振動ふるい機の位置を起点として、時間経過に従って３次元空間の座標位置へ伝搬していくと予測される予測音圧値を、防音建屋の設計要素として取得する。【選択図】図１