"The proximity effect in audio refers to a change in the frequency response of a directional microphone as the sound source is brought in close proximity to the microphone. The result of the change is a disproportionate increase in the bass response of the microphone. The effect is found in directional microphones due to the particulars of its construction... and, consequently, is not exhibited in omni-directional microphones."
Are you saying we should stay away from loud music? And firearms?
it depends on my proximity to the drummers cymbals. When I do wear ear plug"s" I only wear one in the ear closest to the drummer. Cymbal highs give me a killer headache.