Computation of sound radiation by a driver in a cabinet using a substitute source approach

The Journal of the Acoustical Society of America
Anders Lindberg, Goran Pavić

Abstract

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.

References

Jul 1, 1974·The Journal of the Acoustical Society of America·D L DekkerE Dong
Apr 8, 2010·The Journal of the Acoustical Society of America·Ronald M Aarts, Augustus J E M Janssen
Apr 6, 2013·The Journal of the Acoustical Society of America·Ji-Ho Chang, Finn Jacobsen

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