Band Power Criteria

equilibriumequilibrium
in OpenBCI_GUI
Hi Guys,

is there a doumentation on how the band power is calculated?

(what criteria are weighted how? is the band power only cumulated absolute strength of the specific frequency band or is there also a factor including bringing in the relation to the other frequencies?)

thanks and best regards,
Ben

Comments

  • wjcroftwjcroft Mount Shasta, CA
    Ben, hi.

    Here is the source,


    That widget code is plotting,

        GPointsArray points3 = new GPointsArray(dataProcessing.headWidePower.length);
        points3.add(DELTA + 0.5, dataProcessing.headWidePower[DELTA], "DELTA");
        points3.add(THETA + 0.5, dataProcessing.headWidePower[THETA], "THETA");
        points3.add(ALPHA + 0.5, dataProcessing.headWidePower[ALPHA], "ALPHA");
        points3.add(BETA + 0.5, dataProcessing.headWidePower[BETA], "BETA");
        points3.add(GAMMA + 0.5, dataProcessing.headWidePower[GAMMA], "GAMMA");

    Which are computed in,


    Regards,

    William
  • wjcroftwjcroft Mount Shasta, CA
    In neurofeedback at least, band powers are only derived per channel / 10-20 site. I can't think of any applications using head-wide band powers. So you can consider this widget as just showing a general overview of what is happening on all the channels. But those metrics are rarely utilized in practice.
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