"等效虚源法"预测噪声

对于面积或体积较大声源的声传播预测,点声源模式已不适用.通过实验拟合提出了等效虚源法,该新方法可简便准确地预测体声源和面声源在不同距离的影响声级;而对于室内混响窗外传声的声影响预测,采用该方法也会使测量和计算变得十分简洁方便.同时阐述了以传统单点测量来确定声源强度方法存在的缺陷.

Equivalent imaginary source method for noise prediction

For prediction of noise transmited from a source of large area or volume, the point source model is not applicable,therefore an equivalent imaginary source method by experimental simulation is advanced, The new method can simply forcast noise level affected by volume source or area source at different distances, It also makes works of measuring and calculation very convenient when predicts the impaction of noise which reverberates in a room and penetrates out of windows, Meanwhile, some shortcomings in the tranditional one point measuring method which gives the source intensity by only one point are discussed.