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Pandemic science, Talk quietly please

Aerosol emission and superemission during human speech increase with voice loudness (Nature Scientific Reports) https://www.nature.com/articles/s4159... Coughing and sneezing, visible droplets + small ones Visible, 50 micrometres upwards Normal speech, just the small ones One micrometre, invisible Carry a variety of communicable respiratory pathogens Particle emission during normal human speech, positively correlated with the loudness (amplitude) Quite, low amplitude = 1 to 50 particles per second Loud, high amplitude = 10 to 500 particles per second Regardless of the language spoken (English, Spanish, Mandarin, or Arabic) Counting aloud from 1 to 100 releases at least 6 times as many particles as an individual cough Singing, x 6 compared to normal speech Speech superemitters x 10 Small particles Suspend in the air Penetrate deeper Applications Normal speech 10 decibel range Ambient noise in restaurants, 70 decibels Quite zones in public spaces