Interface Phenomena for Planar Waves
Our attention now turns to situations where a plane wave propagates obliquely relative to a planar interface with another medium. The consequence will be a wave that is somewhat different from the one encountered in a one-dimensional waveguide. A wave might also be transferred into the receiving medium. The analyses will employ Cartesian coordinates aligned with the boundary to describe the multidimensional phenomena. Each topic is important for a variety of applications, such as noise control for wall design. Each topic represents an advance toward our goal of fully understanding how acoustical waves behave.