在物理参考书和物理学常用表中,列出了许多声速值,它们通常是标准状态下平原地区不同温度下空气中的声速,以及各种液体、固体中的声速。随着海拔的升高,空气的密度会降低,压强也会降低,与之相关的声速必然也会有所变化。拉萨地处高海拔 In physical reference books and physics tables, many values ​​of sound velocity are listed. They are usually the sound velocity in air at various temperatures in the plains in the standard state, and the sound velocity in various liquids and solids. As the altitude increases, the density of the air decreases, the pressure decreases, and the associated sound velocity inevitably varies. Lhasa is at a high altitude