已知某线声源长度为l0,在线声源垂直平分线上距线声源r0和r处的声级分别为Lp(r0)和Lp(r)。根据《环境影响评价技术导则 声环境》,当r<l0/3且r0<l0/3时,可用于简化计算Lp(r)的公式是()
(A)Lp(r)= Lp(r0)- 10lg(r/r0)
(B)Lp(r)= Lp(r0)- 20lg(r/r0)
(C)Lp(r)= Lp(r0)- 10lg(r0/r)
(D)Lp(r)= Lp(r0)- 20lg(r0/r)
参考答案
继续答题:下一题
(A)Lp(r)= Lp(r0)- 10lg(r/r0)
(B)Lp(r)= Lp(r0)- 20lg(r/r0)
(C)Lp(r)= Lp(r0)- 10lg(r0/r)
(D)Lp(r)= Lp(r0)- 20lg(r0/r)