Optimisation of subwoofer placement using a finite-difference time-domain acoustic simulation
D.E. Flipse (TU Delft - Electrical Engineering, Mathematics and Computer Science)
E. Eisemann – Mentor (TU Delft - Computer Graphics and Visualisation)
J.A. Martinez Castaneda – Mentor (Multimedia Computing)
Marcus Specht – Graduation committee member (TU Delft - Web Information Systems)
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Abstract
The placement of a subwoofer has significant impact on the quality of its sound reproduction. This paper present a method to optimise subwoofer placement in a room. Resonances caused by room boundaries (called "room modes") cause localised peaks and lows for specific lower frequencies. The goal is to minimize the simulated frequency response over a listener region. To simulate the frequency response of a subwoofer location, a Finite-Difference Time-Domain method is applied. The results show that this method correlates to both a measured frequency response and an analytical model. The optimal location predicted with the simulation could not flatten every room mode, but had decreased variation for a number of resonant frequencies.