The method for fans fault diagnosis by using noisefrequencyspectrum was described.
探讨利用噪声频谱进行风机故障诊断的方法。
2
Because the structure vibrates at some modal, a vibration peak value will appear at its noisefrequencyspectrum.
这是因为结构以某一阶模态振动时，将在其辐射噪声频谱上出现一个峰值。
3
By analyzing the exhaust noisefrequencyspectrum and the exhaust noise control methods, the muffler is considered a effective way of controlling exhaust noise.