声波就和光波一样，是以频率、波长和传播速度为其特征。

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

youdao

声波就和光波一样，是以频率、波长和传播速度为其特征。

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

youdao