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오병완,조길호 외2명 陸軍士官學校 1992 한국군사학논집 Vol.42 No.-
The sound pressure level and the sound power level of the fire noise of M16A1 rife are measured around the rifle. It was found that /the difference of the sound pressure levels between the left-hand-side and the right-hand-side of the rifle was not significant but was found significant reduction in backward direction of the rifle. According to the data analysis, the maximum sound pressure level at 4.5m reached about 129 dBA and has a 0.546 mili-second duration. The frequency analysis shows that the fire noise has a maximum sound pressure level at about 1.8KHz band. The sound power level of the source is about 148 dBA and this will gives significant sound pressure level to hurt the human ear of the fire man.