Computation of sound radiation by a driver in a cabinet using a substitute source approach.
Sound radiation by a driver set in a rigid closed cabinet is modeled analytically using the principle of wave superposition. The driver-cabinet assembly is replaced by an array of volumeless substitute sources-monopoles-confined within its surface. The role of substitute sources is to reproduce the sound field exterior to the surface as close to the original field as possible. The frequency dependent positions and strengths of substitute monopoles are optimized by an iterative search procedure aimed at matching the prescribed surface boundary conditions of the original source. The time-consuming optimization of monopole positions is carried out at narrowband center frequencies reducing the computational cost without significant loss of accuracy. The consistency of computed results is verified by checking the power output through the cabinet surface. Modeling is done for anechoic and semi-anechoic conditions. The model has been validated experimentally in a semi-anechoic room with satisfactory results using a mid-range driver set in a closed-box baffle.
Laboratoire Vibrations Acoustique, Institut National des Sciences Appliquées de Lyon, 20 avenue Albert Einstein - 69 621 Villeurbanne, France.
Anders
A
Lindberg
Laboratoire Vibrations Acoustique, Institut National des Sciences Appliquées de Lyon, 20 avenue Albert Einstein - 69 621 Villeurbanne, France.
Goran
G
Pavić