Love to do some charity work. Have a passion for writing and do it in my spare time
W. Mocroft, Philanthropist, Master Degree in International Business, Las Vegas
Answered Nov 23, 2018
Humans survive a range of atmospheric pressures. Provided there is pure oxygen available, a human can still breathe in around 12.2 % sea level air pressure. At the other extreme, the normal atmosphere which is referred to as 1 (atmosphere) is exceeded by deep sea divers to an amazing extent.
I believe the record is 33 atmospheres whereas 3 would stress most of us. However, there are long term bad consequences from putting yourself through extreme atmospheric pressure like deep sea divers sometimes do. Bone death can occur from such excessive stress and therefore shorten the life of such divers.
By definition, standard sea-level pressure or atmospheric pressure is 14.70 pounds per square inch (psi). This can also be described as 1 standard atmosphere. The human body can withstand only 3 to 4 standard atmospheres. It is interesting to compare this to pressure in automobile tires which is about 2 standard atmospheres, or about 29 psi.
It is also interesting to note that for about every 33 feet of water depth, there is about one atmosphere of pressure so you can be crushed by going down to depths of around 100 feet or more.