Furthermore, with the method of amplitude ratio with different frequency selected, the areal attenuation effect and local site response have been studied.
采用振幅谱频率比方法，研究区域衰减效应和局部场地响应。
The results show that when the net exists in the sound field, the washing-ratio is degraded. No evidence exist showing improvement of washing effect at any local point.
结果表明，网的存在降低了处理时的洗净率，没有发现局部处理效果改善的现象。
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