id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-104146-pabh3ajb	de Lussanet de la Sablonière, Marc H. E.	Robust, general purpose, digital power line hum filter which is free of deformations and which can be applied to large transients	2019-11-04		.txt	text/plain	3463	199	66	The resulting periodic median subtraction (PMS) filter reliably removes hum of any harmonic composition, even if the ground frequency is lacking. Even though power 25 line noise is mostly highly regular in frequency, amplitude and wave form, it has proven notoriously difficult to design a filter that is free of artifacts and deformations, which leaves the original signal intact. Subtraction-type filters aim to fit the shape and amplitude of the hum 50 noise directly from the data, sometimes from multiple channels (e.g., in EEG signals) or from a reference channel (e.g. Wan et al., 2006; Lin et al., 2016) . Increasing the filter window of the PMS filter from 50 to 500 periods (10 s) reduced the median absolute error in white noise data to 0.037, which is equivalent to the error in a signal with an HF amplitude of 0.2 (cf.	./cache/cord-104146-pabh3ajb.txt	./txt/cord-104146-pabh3ajb.txt