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How do you recommend to EIT carrier frequency through low pass filtering #10

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rkalahasty opened this issue Dec 8, 2021 · 2 comments

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@rkalahasty
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I am trying to extract EEG from the whole bdf using the low pass filtering that was recommended in the paper. How do you recommend we do this

@Jimbles
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Jimbles commented Dec 17, 2021

Hey. I think the easiest way to do this is to use the "Time difference" datasets, the ones with the -TD# suffix. The lowest EIT frequency injected is 200 Hz so it should be out of band of any EEG activity. You can use the code in Extract_EEG.m as inspiration. You will likely get some artefacts from the EIT injection switches, so you may wish to mask these data points or remove them prior to filtering. Using the Extract_EEG as an example, the switching points can be found at Trigger.RisingEdges{1, 1} or TT.InjectionSwitches

@rkalahasty
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rkalahasty commented Dec 17, 2021 via email

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