What exposure limits are established for impact noise (such as gun fire)?
U.S. Military Standard 1474D, Requirement 4 deals with impact noise and establishes risk criteria in the way of maximum number of exposures to impact sounds at different sound levels, as well as pulse length (the duration of the impact sound, measured in milliseconds). The table below is a simplification of the military requirements, that does not take into consideration the pulse length. The table is therefore more conservative than the Military Standard.
