Finite Different Method Demo Tutorial

Test the software with the following inputs (Navarro et al., 2012):

• Spatial discretization: dx = 0.5 m;

• Time discretization: dt = 1/8000 s;

• Recording total time: T = 2.0 s;

• Room dimension: 8.0 m x 8.0 m x 8.0 m;

• Absorption Coefficient surface i: 1/6 ≈ 0.17;

• Air absorption: 0.0 1/m;

• Absorption term: A_{M};

• Source On time: S = 1.0 s;

• Source position coordinates: 4.0, 4.0, 4.0;

• Receiver position coordinates: 2.0, 2.0, 2.0;

Test if the software provides the following results (Navarro et al., 2012):

• Reverberation time (RT): 1.18 s;

• Early Decay Time (RDT): 1.18 s;

• Clarity (C_{80}): 2.08 dB;

• Definition (D_{50}): 45.63 %

• Centre Time (T_{s}): 85.33 ms