Dynamic Response Characteristics of Human Ear Subjected to High-intensity Sound Shock Wave

doi:10.12382/bgxb.2023.1119

Abstract

Abstract:

The dynamic response characteristics of human ear subjected to high-level sound intensity shock wave are studied.A series of experiments are designed and carried out by a physical headform comprising a realistic ear canal with/without hearing protectors under shock wave from an individual rocket launching.On the basis of the characteristics analysis of shock wave,a human ear test device model is designed as the research object.A test method of protective performance against shock waves for hearing protection devices(HPDs) is developed.The shock wave overpressures in the ears of gunner and assistant gunner are measured and analyzed.The measured data are analyzed by the wavelet transform method.The two kings of evaluation method for the safety limit of shock wave are compared.The results indicate that the high-intensity sound shock wave has instability,peak overpressure,short duration and multiple pulses during launching.It also has a wide spectrum with complex components and typical characteristics of low frequency and high sound pressure.The HPDs significantly reduce the effect of shock wave on the human ear,resulting in a prolonged action time and a significantly decreased peak overpressure.The peak overpressure and sound pressure level of shock wave on the gunner right ear could be attenuated by 95.7% and 14.8%,respectively.The calculated results about allowable exposure times per day from the evaluation modelin the modified GJB 2A-1996 and the AHAAH model in MIL-STD-1474E is roughly equivalent.The refined penetration formula in GJB 2A-1996 is feasible and can predict the permitted daily exposures times.This study can provide theoretical basis and practical guidance for test system design optimization of the individual weapons.

Key words: individual rocket weapon, high-intensity sound shock wave, ear canal, earmuff, allowable exposure times per day

CLC Number:

O389

LI Gang, HU Zhongling, HU Bin, LI Zhiyu, CAI Meng, HUANG Tushun. Dynamic Response Characteristics of Human Ear Subjected to High-intensity Sound Shock Wave[J]. Acta Armamentarii, 2025, 46(1): 231119-.

Figures/Tables 28

References 38

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类别	名称	口径/ mm	发射冲击波
类别	名称	口径/ mm	超压峰值/kPa	噪声/dB
国外	M72轻型反装甲武器	66	8.83	173
	LAW80火箭筒	80	19.62	180
	阿匹拉斯火箭筒	112	>34.92	>185
	M119榴弹炮	105	>28.10	183
	卡尔·古斯塔夫无后坐力炮	84	>31.10	>184
国内	78式82毫米无坐力炮	82	14.91	177.6
国内	PF89式单兵火箭筒	80	15.70	178

类别	名称	口径/ mm	发射冲击波
类别	名称	口径/ mm	超压峰值/kPa	噪声/dB
国外	M72轻型反装甲武器	66	8.83	173
	LAW80火箭筒	80	19.62	180
	阿匹拉斯火箭筒	112	>34.92	>185
	M119榴弹炮	105	>28.10	183
	卡尔·古斯塔夫无后坐力炮	84	>31.10	>184
国内	78式82毫米无坐力炮	82	14.91	177.6
国内	PF89式单兵火箭筒	80	15.70	178

工况	人耳测试装置防护情况	试验发数
1	未佩戴防护设备	2
2	佩戴头盔、耳塞、耳罩	4

工况	人耳测试装置防护情况	试验发数
1	未佩戴防护设备	2
2	佩戴头盔、耳塞、耳罩	4

工况	测点1	测点2	测点3	测点4	射手1		射手2
工况	测点1	测点2	测点3	测点4	右耳	左耳	右耳	左耳
1-1	29.0	33.5	25.2	21.9	47.8	14.0	124.3	39.5
1-2	24.1	32.6	25.1	22.2	32.5	15.4	79.4	36.9
2-1	23.8	29.4	24.8	21.4	3.0	1.1	5.0	3.7
2-2	26.2	42.4	27.3	23.1	1.3	2.3	8.9	2.1
2-3	21.1	28.1	27.4	26.9	1.0	2.3	7.7	2.6
2-4	28.6	33.4	26.0	23.9	1.5	3.3	7.0	2.2