The post describes a recent paper “Acoustic effects of medical, cloth, and transparent face masks on speech signals” in The Journal of the Acoustical Society of America. This work was also discussed in The Hearing Journal and presented at the 179th Acoustical Society of America meeting.
Please note: Peter Keen, a frequent contributor to BATOD magazines and the profession enters this caveat: “Some interesting stuff for lay people. I would disagree with his statement that you should ‘speak up’ to compensate for the loss of higher frequency speech sounds. Talking louder only increases the lower frequencies, not the higher ones.”