id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-171219-jkoegawm	Sheets, Donal	An apparatus for nondestructive and rapid comparison of mask approaches in defense against infected respiratory aerosols	2020-06-03		.txt	text/plain	5346	241	51	We present and discuss both the pressure drop and the particle transmission as a function of flow to permit comparison of relative protection for a set of proposed filter and mask designs. Controlled flow of aerosolized air propagates from the IP chamber to the CE chamber and enters the MP chamber through either (a) a mask-donning dummy head or (b) a clamped-material tester depending on the state of two ball valves (Figure 2c ). The chambers are connected sequentially IP-CE-MP with gas flow fittings and feature calibrated sensors capable of measuring flow rate, pressure drops, and aerosol particle distribution in different size ranges. Aerosol particle distributions are measured before and after the mask or the filter material and the experiment is repeated with an open system and a control high-performance mask (3M-1860 N95 standard) for comparison.	./cache/cord-171219-jkoegawm.txt	./txt/cord-171219-jkoegawm.txt