It will be about medical masks, which are usually blue with a white inside out. They have a wire on top that needs to be adjusted to the shape of the nose and there are rubber bands clinging to the ears. The mask itself consists of three layers, which not everyone knows about.
When I went to be vaccinated with Sputnik for the first time, an aunt in such a mask coughed me up very well.
The fact is that on a small female head, a medical mask can protrude in the cheek area in front of the ears with such sockets directed towards the ears. Reminds the air intakes of the eared car Zaporozhets. Take a look at Figure 1.
These flares are directed backwards. When my aunt coughed, the streams of her cough flew back and reached me. I felt them on my face. This is very bad.
So, in order to reduce the harmful effect of such bells, the Americans proposed a couple of ingenious solutions.
Today we will analyze a way to modernize such a mask, which is called "tie and tuck". Take a look at Figure 2.
This is a mask with an elastic band tied in a knot, pulling the corners of the mask together. Looks clear? From such tying, the shape of the mask changes and the harmful sockets only become larger. Therefore, we must add here a technique called "tuck".
It is necessary to tuck this bell under the mask - tuck it in. So the bell is kept tucked in, and snot does not fly at those who are behind.
This technique may not work for men with wide faces and large cheeks. The modified mask would be too small for them.
Scientists have tested the effectiveness of a tied tucked mask
Let's say that a sick person coughs on you without a mask, and you are not wearing a mask. Let it be conditionally 100% of the number of infectious drops that will fly into your nose.
It turned out that if you are wearing an ordinary medical mask, and next to a patient without a mask is coughing at you, then your unfortunate medical mask will delay only 7.5% of dangerous drops.
If a coughing patient is wearing a medical mask, and there is nothing on you, then his mask will retain 41% of dangerous particles. The rest of the particles will fly into your nose.
But if you are wearing a mask with knots and tucked edges, then it will delay 65% of other people's snot.
If such a modified mask is on the patient, then 63% less snot will fly into your nose.
If you both wear these masks, then 96% less infectious drops will reach your nose.
If both of you were just wearing medical masks without knots, they would protect at best by 84%.
I like this approach. Have you tried it?
