Theoretical Prediction of the Scattered Energy Distribution in the Near Field of Diffsorbers

Due to its diffusion and coexistent absorption property,diffsorber can be chosen to adjust the acoustics of small rooms such as listening rooms,recording studios conveniently. Considering the vibration of air surrounded a diffsorber,when it is stimulated by 100 Hz single-frequency oscillation,within a half cycle,based on hydrodynamics and making use of Navier-Stokes equations as governing equations to consider the air viscosity and heat transportation,a model for analyzing the intricate sound field near the surface of a typical diffsorber is made. The transient response of sound field is achieved by solving such equations via a time-splitting method. Consequently,the relate vibration velocity field as well as the pressure field can be acquired and the scattered energy distribution then would be derived.