Low-frequency room demerit analysis and equalization using properly-modeled source terms in finite-difference time-domain simulations
Keywords:Finite difference time domain method, Resonance, End-wall, Finite difference time domain simulations, Finite-difference time-domain simulation, Frequency modes, Low frequency, Low-frequency resonance, Source terms
AbstractA study was conducted to perform low-frequency room demerit analysis and equalization using properly modeled source terms in finite-difference time-domain (FDTD) simulations. It was observed that the end-wall adjustment helped in equalizing things, as exciting the lowest modes corresponding to the W dimension was avoided. This had no effect on the lowest frequency modes that were attributed to the L dimension, which caused the largest low frequency resonances. The L-dimension modes were considered by the rear cancellation method and it was observed that all the modes below 130Hz were removed when the low frequency resonances created problems.
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