Health
Coronavirus: Scientists argue that speaking quietly can reduce the spread of deadly bugs
Quiet zones of high-risk indoor spaces such as hospitals and restaurants Corona virus Researchers say there is a risk of transmission after showing that reducing the volume of speech can reduce the spread of the disease.
Scientists said Wednesday in a preliminary copy of a paper detailing the study that a reduction in average speech level of 6 decibels would have the same effect as doubling room ventilation in an effort to control transmission. Scientists said they could.
“The results suggest that public health authorities should consider implementing’quiet zones’ in high-risk indoor environments such as hospital waiting rooms and dining facilities,” said the University of California, Davis. Six researchers write.
The World Health Organization changed its guidance in July to recognize the potential for aerosol transmission during choral practice and in restaurants and fitness classes.
The paper showed that the microscopic droplets ejected during the talk evaporate, leaving behind aerosol particles large enough to carry the viable virus.
(Image: Getty Images)
Increased loudness by about 35 decibels, or the difference between whispering and screaming, increases particle emission by a factor of 50.
Normal conversation is over the range of 10 decibels, but the noise around the restaurant is about 70.
“Not all indoor environments are equal in terms of aerosol transmission risk,” said lead researcher William Ristenpart.
No video available
“A crowded but quiet classroom is far less dangerous than an uncrowded karaoke bar where patrons are far away but speak and sing loudly.”
The global death toll from the virus exceeded 900,000 on Wednesday. This is because Reuters totals more than 27.7 million cases worldwide.
On average, more than 5,600 people die each day, according to Reuters calculations.
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