2 ) in order to solve the scattering and diffraction of sound radiation , in this dissertation , based on helmholtz equation and its boundary equations , modeling of three - dimensional fem is given for computing low frequency sound transfer function in small enclosures 2 )為解決聲音在傳播過程中所發(fā)生的散射和衍射現(xiàn)象,本文基于有源helmholtz方程及其邊界條件,建立了求解小尺度封閉空間內(nèi)低頻聲傳遞函數(shù)的三維有限元模型。