它增加了每一单位面积上厕所间的使用率。
换句话说，无论人离声源多远，在每一单位面积内都有一定数量的能量传到人耳。
In other words, the amount of energy per unit of area contacts a person's ear regardless of how far she or he is away from the source.
缩写p【物理学】压力；压强：统一作用于物体表面的力量，用每一单位面积上的压力计量。
Abbr. PPhysics force applied uniformly over a surface, measured as force per unit of area.
应用推荐