己知某线声源长度为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<(r)的公式是(3时,可用于简化计算Lp3且r0
A.Lp (r)=Lp (r0)-10lg (r/r0) B.Lp (r)=Lp (r0)-10lg (r/r0) C.Lp (r)=Lp (r0)-10lg (r0/r) D.Lp (r)=Lp (r0)-10lg (r0/r)正确答案A
己知某线声源长度为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<(r)的公式是(3时,可用于简化计算Lp3且r0
A.Lp (r)=Lp (r0)-10lg (r/r0) B.Lp (r)=Lp (r0)-10lg (r/r0) C.Lp (r)=Lp (r0)-10lg (r0/r) D.Lp (r)=Lp (r0)-10lg (r0/r)正确答案A