An Experimental Study on Shielding Apparatus for the Impulse Noise of K2 Rifle

Lee, Jin-Ho

Journal of the Korea Institute of Military Science and Technology 2010;13(3):486-492.

Jin-Ho Lee

K2소총의 사격음 차폐장치에 관한 실험적 연구

이진호

육군3사관학교 기계공학과

Abstract

This paper studies an experimental analysis of the impulse noise of K2 rifle when its bullet passes through the large tube(length 1.84m, outer diameter 50cm, glass wool & steel). In experiment, the characteristics of the sound of shooting were different according to the way of shooting; the results of the experiment are given below. First of all, the shooting sound was lower in single-shot shooting, when compared to 3rds burst-shot shooting, difference averaging 2.8dB, 4.0dB at maximum. In short, the difference is minuscule. Secondly, the sound of the K2 rifle was diminished when shot in a tube, ranging from 2.7dB to 15.4dB, averaging 8.2dB. Thirdly, the shooting sound of the K2 rifle was diminished as the insertion depth deepened with formulas given in Fig. 5, 6. Fourthly, basic data for excluding sound of the shooting were presented. Lastly, the characteristics of the shooting sound could be equally used as a basic material for developing marksmanship and sharp-shooting detection device.

Key Words: K2 Rifle, Shooter, Impulse Noise, 3rds Burst-Shot