bandpass high/low pass

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bandpass high/low pass

Post by Jim » Wed Apr 29, 2015 9:51 am

Hi, everyone,

I have a question on high/low pass settting with online EEG data collecting. specifically speaking, On the monopolar display, what the range of Hz should I set for high/low pass? there is a default low pass (100 Hz) and high pass (0.16Hz). Should tick it or not?

On one participant, I tried disenable the filtering (untick these two boxes), the EEG data is very bad.

What should I do here?


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Re: bandpass high/low pass

Post by Coen » Fri May 01, 2015 11:33 am

The filters (and reference selection) only affect the displayed signals (not the data to file, that's always DC - 1/5th of the sample rate, and unreferenced).

Set the filters to limit the display to the bandwidth of interest (suppress low frequency drift and high frequency noise). Choose a proper reference for sufficient rejection of Common Mode on the displayed signals.

Best regards, Coen (BioSemi)

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