The results show that the engine noise is additive weak-intensity continuous spectrum or compound spectrum and for some frequencies it is both continuous and linear.

结果表明：发动机噪声主要是加性、低强度的连续频谱，在某几个频率成分上也分布着线状频谱。

youdao

The results show that the engine noise is additive weak-intensity continuous spectrum or compound spectrum and for some frequencies it is both continuous and linear.

结果表明：发动机噪声主要是加性、低强度的连续频谱，在某几个频率成分上也分布着线状频谱。

youdao