The faintest sound an ear can hear (20 micro-pascals) is roughly times smaller than atmospheric pressure at sea level.

At sea level, there is one standard atmospheric pressure which is equal to 101.325 kilopascals.

The pressure of faintest sound that a human ear can hear is 20 micro-pascals.

taking the ratio of two:

Hence, the atmospheric pressure at sea level is times greater than the faintest sound that a human ear can hear.

moisture is lackin, and organic acids are scarce.