The open Master Hearing Aid Forum

This is valid python 3, see https://docs.python.org/3/faq/programmi ... ction-mean

No, this is not a feature of this GUI. In order to access all insertion gains, you would have to extract (with mha_get()) the gtdata matrix from the MHA dc plugin that you have just fitted.

Your graphs for 20dB pantonal hearing loss show amplification for frequencies above 500Hz. Please refer to the openMHA Fitting GUI manual for an explanation of the display. I hope this helps, please ask follow-up questions here if anything remains unclear so that we can improve the documentation.

Each entry in the shapes matrix is a weight factor with which each STFT bin is mapped to each band. For rectangular filters, you will see mostly ones and zeros. I suggest plotting the shapes with Matlab or octave to inspect the shapes: mesh(mha_get(mhahandle,'path.to.fftfilterbank.shapes')) (Adapt p...

Two possibilities:

1. Use a debugger, set breakpoints, display the variables you are interested in.

2. Hack the source code to export the data that you are interested in in some suitable form, recompile.

It's all open source after all.

Not every C++ variable that you find in the source code of the plugins is exported to the configuration tree, and therefore not every C++ variable is accessible from Matlab. You can find the accessible configuration variables for each plugin in the plugin manual, http://www.openmha.org/docs/openMHA_...

Please clarify what you want to achieve, e.g. by giving an example of the desired outcome.

Yes the conversion to dB is done by MHASignal::pa22dbspl. See its documentation here: http://mha.hoertech.de/doc/master/namespaceMHASignal.html#adffb46b90b6e9460f06286bda1c6d1de mha_real_t MHASignal::pa22dbspl ( mha_real_t x, mha_real_t eps = 0.0f ) inline Conversion from squared Pascal scale to dB ...

Computation of level from signal in openMHA does not need to know the peaklevel that you configured in plugin transducers. To understand how the level computation from STFT spectra works in openMHA, you need to be aware of two openMHA properties: 1) Central calibration. Because hearing aid signal pr...