Methods Use a standing wave tube to measure the sound absorption coefficient of many kinds of grain.

采用驻波管法测量了多种粮食的吸声系数。

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A standing wave tube measurement system is presented for measuring low frequency acoustic properties of underwater acoustic materials.

介绍一种用于水声材料低频声性能测量的驻波管测试系统。

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The surfer, standing in the tube, or just in front of the break, slides down the wave like a skier, while the wave, and the buoyancy of the surfboard, bear him upwards and forwards.

ECONOMIST: On the beach