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Multichannel Low Frequency Room Simulation with Properly Modeled Source Terms — Multiple Equalization Comparison
At low frequencies unwanted room resonances in regular sized rectangular listening rooms cause problems. Various methods for reducing these resonances are available including some multi-channel methods. Thus with introduction of setups like 5.1 surround into home theatre systems there are now more options available to perform active resonance control using the existing speaker array. We focus primarily on comparing, separately, each step of speaker placement and its effects on the response in the room as well as the effect of adding additional symmetrically placed speakers in the rear to cancel out any additional room resonances. The comparison is done by use of a Finite Difference Time Domain (FDTD) simulator with focus on properly modeling a source in the simulation. A discussion about the ability of a standard 5.1 setup to utilize a multi-channel equalization technique (without adding additional speakers to the setup) and a modal equalization technique is later discussed.
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