Sound waves travel outward like balloons expanding around their source. The sound's power is distributed on the surface of the wave which increases with the square of the distance from its source.

声波的扩散就好比气球的膨胀，声波从声源向四周扩散，声音的能量也随着声波四散开来。

youdao

Sound waves travel outward like balloons expanding around their source. The sound's power is distributed on the surface of the wave which increases with the square of the distance from its source.

声波的扩散就好比气球的膨胀，声波从声源向四周扩散，声音的能量也随着声波四散开来。

youdao