Health Care

Speaking loudly could help spread virus, study finds

Speaking loudly could help spread virus, study finds”

They also found the larger particles decayed more quickly than smaller particles, probably because they dehydrated quicker.

Laser scans showed that about 2,600 small drops were produced per second as they spoke.

The same team has observed that speaking less loudly will generate fewer droplets.

Taking into account the known concentration of coronavirus in saliva, scientists estimated that each minute of loudly speaking can generate more than 1,000 virus-containing droplets capable of remaining airborne for eight minutes or more in a closed space.

According to the study published in the journal Proceedings of the National Academy of Sciences of the United States of America (PNAS), These illuminated droplets stayed in the air for 12 minutes.

The observations confirmed there is a substantial probability that normal speaking causes airborne virus transmission in confined environments.

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"This suggests that virus from an infected individual could be transmitted this way in confined spaces, however there is no direct analysis of the presence of viruses in the droplets or their ability to pass on infection".

The phrase was chosen because the "th" sound in the word "healthy" was found to be "an efficient generator of oral fluid speech droplets".

However, the findings will need to be replicated in more real-world circumstances.

What researchers don't know yet is whether all droplets of speech, cough, and sneeze that carry virus particles are equally infectious, or whether it is necessary to transmit a specific amount of virus for a person to become ill from breathing it.

"The work is a physical study using a laser scattering method".

"Based on this and other evidence, it would be wise to avoid extended face-to-face conversations with other people unless you are far apart and in a well-ventilated space, including outdoors", Linsey Marr, a professor of civil and environmental engineering at Virginia Tech told the New York Times. Putting on a mask will be even better.



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