摘要
该文从声场方程出发推导出波在非均匀媒质中传播时的波动方程,并利用WKB近似法得出声波在空气中传播时波函数的表达形式,为研究声波在非均匀媒质中的传播提供了一种近似解。
According to equation of sound field,this paper derivedwave equation for wave propagation in nonhomogeneous media, thenapplied WKB-approximation to obtain wave function for sound wavepropagation in air, thus providing approximation for wave propagationin nonhomogeneous media.
关键词
波动方程
波速
波矢
声波
wave equations
wave velocity
wave vector
