Abstract
A finite element method is investigated for sound propagation through the air in which the influences of meteorological conditions are introduced. The basic equations are a coupled partial differential equation system with respect to the sound pressure and the acoustical velocity. The state and motion of the ambient air are assumed steady but spatially distributed. A modified Mur's outgoing boundary condition is incorporated. Several numerical examples show that the present method can simulate refractive effects of the sound waves through stratified air or wind.
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