c0 343[m/s] "Speed of sound"
rho0 1.225[kg/m^3] "Density"
f0 125[Hz] "Frequency parameter"
n 2 "Band number"
N 6 "Frequencies per band"
f_start 125[Hz] "Center frequency of band 0"
fC f_start*2^n "Band center frequency"
fL fC*2^(-1/2) "Band lower frequency limit"
fU fC*2^(1/2) "Band upper frequency limit"
df_log (log10(fU[1/Hz])-log10(fL[1/Hz]))/N "Log of frequency steps (in band)"
theta0 45[deg] "Incidence polar angle from normal direction"
x_spec r0*sin(theta0) "x-coordinate for specular direction"
y_spec r0*cos(theta0) "y-coordinate for specular direction"