物理性污染控制习题答案—噪声部分略略解:解解 解解解按球面波考虑解解解解解解倍频程F=0.3治理前响度指数分别为N1=18(sone)N2=50(sone)N3=55(sone)N4=50(sone)N5=30(sone)治理后N1=10(sone)N2=23(sone)N3=29(sone)N4=23(sone)N5=22(sone)治理前总响度=550.3(1850555030-5