#67 HRIR_ARI.sofa wraps around the 0ms

[Sergejs]

Could someone please clarify if it is OK that ear HRTF wraps around the zero millisecond mark in the resulting SOFA file? I think I did something wrong, but the settings in the Output2HRTF.m file seem to be correct:

% source information
sourceType = 'vibratingElement';
sourceCenter(1,1:3) = [-0.000075 0.061193 0.000278];
sourceArea(1,1) = 3.3792e-07;
sourceCenter(2,1:3) = [0.004424 -0.065447 0.001078];
sourceArea(2,1) = 4.63999e-07;

% Reference to a point source in the origin
% accoring to the classical HRTF definition
% (https://doi.org/10.1016/0003-682X(92)90046-U)
reference = true;

% Compute HRIRs via the inverse Fourier transfrom.
% This will add data at 0 Hz, mirror the single sided spectrum, and
% shift the HRIRs in time. Requires reference = true.
computeHRIRs = true;

[Fabian Brinkmann]

Hi Sergejs,

Its not ok, and it should appear in the HRIRs computed by Mesh2HRTF. How did you do the plot? My guess is, that this is a problem of the Matlab/Octave SOFA API, not Mesh2HRTF.

Best, Fabian

[Michael Mihocic]

Good morning Sergejs,

I am more familiar with the Matlab/Octave SOFA API than with Mesh2HRTF. I will check if the issue is caused by the SOFA API.

How did you create the figure? Can you please tell me how I can reproduce it?

Best regards,
Michael

[Sergejs]

We leave this issue, because it is superseded by ticket #70 and this issue involved older Matlab code executed in Octave. The latest approach uses a different Python code for post-processing, so no point in debugging this old run.