id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-104138-qagyaegp	Magee, Michelle	Effects of face masks on acoustic analysis and speech perception: Implications for peri-pandemic protocols	2020-10-08		.txt	text/plain	2183	138	52	Here we investigated how three face mask types (N95, surgical and cloth) affect acoustic analysis of speech and perceived intelligibility in healthy subjects. We compared speech produced with and without the different masks on acoustic measures of timing, frequency, perturbation and power spectral density. Our data show that face masks change the speech signal, but some specific acoustic features remain largely unaffected (e.g., measures of voice quality) irrespective of mask type. Where the interaction was significant, planned comparisons were made for each 1Khz frequency band to determine differences between masks types compared to no mask. For recordings produced with the tabletop microphone, there was a significant effect of mask type for percentage of pauses (F3,7.87=8.17, p=0.008), and spectral tilt (F3,8.39=15.43, p=0.001) ( Table 1) . We observed significant differences in acoustic power distribution across relevant frequency bands for speech in all three mask conditions compared to no mask.	./cache/cord-104138-qagyaegp.txt	./txt/cord-104138-qagyaegp.txt