Following the gradual introduction of vocal support from the J.League soccer team from next month, the National Institute of Advanced Industrial Science and Technology investigated how to fly by vocal support, and as a result, wore a non-woven mask. It turned out that the flight can be suppressed from 96% to 99%.
The J-League has banned aloud support at the stadium after the spread of the new coronavirus, but has decided to introduce it in stages from next month.
In response to this, AIST and Professor Tomoaki Okuda of Keio University, who are cooperating in the J-League investigation, made a "call" to shout out the team name in rhythm and sang a cheering song called "chant". For the first time, I investigated how much flying would spread.
In the experiment, the team's name was called out loud in three patterns, when the mask was not worn, when the non-woven mask was worn, and when the urethane mask was used, and the flying conditions were compared.
As a result, it was found that wearing a non-woven mask reduced 96% to 99% of the fine particles of 3 to 9 micrometers scattered in the air compared to those without a mask.
The particles that could be cut with a urethane mask were 83% to 89% compared to those without a mask.
Professor Okuda said, "I found that if I wear a non-woven mask properly, the amount of flying can be significantly reduced even if I cheer loudly. I want to accumulate scientific facts and find a better way." I did.
In addition, Akane Suzuki of the J.League New Coronavirus Countermeasures Department said, "I thought it was important to wear a mask properly when cheering for voice in order to protect each other. I want to appeal for safety as well so that it will come true. "