关于sysnoise中的peak与RMS？

文枫

RESP IR, LFTAB, LDTAB, ITYPE, RATIO, DTIME, TMIN, TMAX

——Generates a response spectrum

The response spectrum is defined as the maximum response of single degree of freedom systems of varying frequency (or period) to a given input support excitation. The equation describing the response of the system in terms of the relative displacement (X) is:

式中：ξ表示阻尼比（ratio of viscous damping to critical damping）；ωn表示系统固有频率（natural frequency of the system）；Xo表示ground displacement。

The solution of this equation for the maximum response, ,at various frequencies results in the spectral response curve。

从上面ansys中的help文件看出，通过resp得到的频域位移曲线是最大值，是peak?

如果是peak的话，那么在计算辐射噪声的时候又采用RMS，是不是矛盾了？求解释