Scientists tested 14 types of masks — here are the ones that worked and didnt – New York Post

Bandannas, gaiters and knitted masks are a few of the least efficient face coverings for preventing the spread of coronavirus, according to a new study.
Researchers at Duke University made the discovery while testing 14 different types of masks, according to the study published Friday.
N95 masks, frequently utilized by health care professionals, worked best to stop the transmission of breathing beads during routine speech.
Other excellent performers at stopping leakage were three-layer surgical masks and cotton masks, which can be made at house, the scientists with Dukes physics department found.
While bandannas and knitted face coverings might be a special look, they did not offer much defense, according to the research study.
The scientists also discovered that neck fleeces, or neck gaiters, often used by runners, were the least effective and really permitted more breathing beads to leave than not using a mask at all.
Thats because they were revealed to break down larger beads into smaller sized particles, allowing them to slip out the sides of the covering more quickly.
” We were exceptionally amazed to discover that the number of particles determined with the fleece actually went beyond the number of particles determined without wearing any mask,” Martin Fischer, one of the studys authors informed CNN.
” We wish to emphasize that we actually motivate individuals to use masks, however we want them to use masks that in fact work.”
To evaluate the masks, the scientists used a black box outfitted with a cell and a laser phone video camera.
Somebody using a face mask would speak in the instructions of the laser beam inside package. Then, the quantity of respiratory beads scattered by the beam were taped by the camera in the back of package.
A computer algorithm then counted the droplets seen in the video to identify how many had actually leaked through.
The researchers stated this was a low-priced, effective technique to test which face coverings worked and which didnt.
” This is a really effective visual tool to raise awareness that an extremely easy masks, like these homemade cotton masks, do actually well to stop the majority of these respiratory beads,” Fischer informed CNN.
” Manufacturers and companies can set this up and test their mask styles prior to producing them, which would also be really helpful.”

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