多自由度波导抑振器具有吸收低频入射声波的功能。
The multiple degrees of freedom (MDOF) waveguide vibration suppressor has the capacity to absorb low frequency sound.
具有垂直方向指向性的接收基阵对入射声波有方向加权效应。
The receptive array with directivity in the vertical plane has weight effect on the incident wave.
火苗的波峰和波谷数目随入射声波的频率改变而有规律的变化。
The number of wave crests and wave troughs of the flame varies regularly with the change of frequences of incoming waves.
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