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When Prime Minister Justin Trudeau was asked about the benefits of wearing face masks to stop the spread of the Coronavirus, he said that “they are helpful in that they protect others from you “breathing or speaking moistly on them.”
The word ‘moistly’ caused a universal uproar. Comedians had a field day as usual, but Trudeau was actually giving an appropriate and descriptive name to one of the major avenues of infection, which is our own speech.
One of the reasons COVID-19 spreads so quickly is that it is transmitted from people who are asymptomatic. But if they don’t sneeze or cough on you, how are they actually infecting you?
Research is now showing that coughing and sneezing are small potatoes compared to the amount of aerosols people emit while they speak. Coughing and sneezing are like brief but potent rain showers, whereas speaking is a day long drizzle, with smaller drop sizes that can penetrate deeper into the lungs of the unfortunate recipient. They also remain airborne longer, since they are smaller.
It is not just speaking that releases more particles than coughing or sneezing. A person who decides to declare their love by bursting into a serenade, is actually emitting 6 times more airborne droplets than if they were merely reciting a poem.
If things weren’t bad enough, it turns out that people with loud voices emit an inordinate amount of particles. Not only are they a danger to your ear drums but they actually are equivalent to the fire breathers of yore.
Although the louder you speak the more particles you emit, the study also found that certain units of speech generate more aerosols than others. For example, the "E" sound in "need" produces more particles than the "A" in "saw." Read more...