Like light waves, acoustic (sound) waves are characterized by a frequency, wavelength and propagation speed.

声波就和光波一样，是以频率、波长和传播速度为其特征。

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Like light waves, acoustic (sound) waves are characterized by a frequency, wavelength and propagation speed.

声波就和光波一样，是以频率、波长和传播速度为其特征。

youdao