Everyone is certainly entitled to their opinion and sometimes when I hear people talking about measurements with test equipment, I wonder if the ear may actually be superior to that test equipment. The ear is more sensitive than some people realize.
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/earsens.html
http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/earsens.html