Figure 5.8: Amplitude spectra for the varying secondary source distribution conditions. The spectra was simulated for the place of the left ear of the listener. The left graph shows the spectra for the central listening position, the right for the off-center position. The distance between the secondary sources is given for all WFS spectra. The spectra are shifted in absolute magnitude in order to meaningfully display them. Parameters: x_s = (0,2.5,0), x_ref = (0,0,0) m, circular secondary source distribution with a diameter of 3 m.
By setting the sampling rate to 48000 Hz and using a fractional delay filter the frequency responses look more flat and show no artifacts for the three smallest loudspeaker spacings (code to reproduce this figure).
Bash:
$ gnuplot fig5_08.pltIf you want to recalculate the frequency responses yourself, you have to run the following commands in Matlab/Octave before running gnuplot:
>> cd matlab
>> freqresp_WFS_center
>> freqresp_WFS_offcenterThis will override the txt-files in the data directory.