Eye Blink / Jaw Artifact filtering




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Eye Blink / Jaw Artifact filtering

Postby encoded_evolution » Thu 15. Sep 2022, 16:59

Hi all, I fought a little bit to figure out how to effectively attenuate noise due to eye blinks, jaw clenching and wire movement. I have settled on a good solution that serves my needs, and could be a good template.

I am using the Muse, but this should be a good way to do the same on other devices. See attached a basic design showing unfiltered raw input vs filtered input using thresholds. The "magic" was setting the FALSE output to zero, instead of the default INV which was causing a lot of ringing. I set my limits to +/- 50 microvolts, you may want to change yours.

Also attached is an eyes open / eyes closed edf. The first half of the edf has plenty of eyeblinks (on purpose, for testing).
Attachments
Muse_EO_EC.zip
EDF file with eyeblink examples
(640.11 KiB) Downloaded 16 times
Muse_FR_BlinkJaw.con
(7.58 KiB) Downloaded 15 times
encoded_evolution
 
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by Advertising » Thu 15. Sep 2022, 16:59

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