spectral profile of line noise

May 27, 2020

the spectral profiles of three different types of line noise from today. 'standard' one with very narrow-band peak. a bursting type and one with weird amplitude modulation, with a broader bandwidth of the peak. pic.twitter.com/Un2EOQ7ixV
— Natalie Schaworonkow (@nschawor) May 27, 2020

MEG artifacts: railway traction power

April 10, 2026

more MEG artefacts: the tram runs in ~200 meter distance from the MEG lab here. even though the MEG sensors are shielded by a few tons of metal, they still pick up the railway traction power signal (at 16.67 Hz in Germany), a demo of their high sensitivity.

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— Natalie Schaworonkow (@nschawor.bsky.social) 10 April 2026 at 15:05

MEG artifacts: metal belt buckle

March 25, 2026

artefacts in MEG: here, the participant forgot to remove a belt with a metal buckle. the buckle moves when breathing, introducing low frequency artefacts. taking off the belt solves resolves this. 🙂

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— Natalie Schaworonkow (@nschawor.bsky.social) 25 March 2026 at 15:25

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MEG artifacts: railway traction power

MEG artifacts: metal belt buckle