Browse > Article
http://dx.doi.org/10.14346/JKOSOS.2014.29.3.085

A Study of the Comparison Analysis for the Rocket Motor Impulse Noise by the Indoor Sizes  

Song, Kee-Hyeok (Agency for Defense Development)
Chung, Sung-Hak (Agency for Defense Development)
Kang, WooRam (Korea Advanced Institute of Science and Technology)
Lee, DukJu (Agency for Defense Development)
Park, JongHo (ChungNam National University)
Publication Information
Journal of the Korean Society of Safety / v.29, no.3, 2014 , pp. 85-90 More about this Journal
Abstract
The purpose of this study is to analysis the 3 differential size of the interior space for impulse noise. To achieve this goal the 3 kinds (27, 35, $50m^3$) of interior space were performed comparing the impulse noise. Result of this study, the standard error of the mean peak sound pressure of value from 0.19 to 0.27dB and there was no significant difference (p<0.01). And B-duration is significant differences (P<0.01) range from 3.98 to 7.93ms. This is respectively less than 10ms. These findings are confirmed in accordance by the 3 differential space size of the indoor-impulse noise due to 0.3 dB or less, so there was no difference to the operational influence. And also below 100 Hz were found fundamental mode frequency analysis. Results were matched with calculated theoretical values.
Keywords
indoor noise; indoor-impulse noise; space size; peak sound levels; B-duration;
Citations & Related Records
연도 인용수 순위
  • Reference
1 W. J. Murphy and C. A. Kardous, "A Case for using A-weighted Equivalent Energy as a Damage Risk Criterion", National Institute for Occupational Safety and Health, EPHB Report No.350-11a, 2012.
2 M. J. Lighthill, "On Sound Generated Aerodynamically: I, General Theory", Proc. Royal Society of London, Series A, pp.564-587, 1952.
3 G. R. Price, "Firing Recoilless Weapons from Enclosures," Technical Memorandum 20-91, U.S. Army Human Engineering Laboratory, Aberdeen Proving Ground, MD, pp.39-48, 1991.
4 G. R. Price, "Firing from Enclosures with 90mm Recoilless Rifle: Assessment of Acoustic Hazard," Technical Memorandum 11-78, U.S. Army Human Engineering Laboratory, Aberdeen Proving Ground, MD, pp.1-14, 1978.
5 MIL-STD-1474D, "Department of Defense Design Criteria Standard", 1996.
6 M. P. Branch, "Comparison of Muzzle Suppression and Ear-level Hearing Protection in Firearm use", 2011.
7 G. R. Garinther and J. B. Moreland, "Transducer Techniques for Measuring the Effect of Small Arms' Noise on Hearing. Technical Memorandum", U.S. Army Human Engineering Laboratories, Aberdeen Proving Ground, MD, pp.11-65, 1965.
8 J. H. Patterson and D. L. Johnson, "Temporary Threshold Shifts Produced by High Intensity Free field Impulse Noise in Humans Wearing Hearing Protection", USAARL Report No. 8, pp.94-46, 1994.
9 K. Buck, "Performance of Hearing Protectors in Impulse Noise", RTO HFM Lecture Series, 2000.
10 Y. H. Kim, "Lecture of Acoustics", ChungMonGak, pp.204-213, 2013.
11 C. L. Morfey, "Acoustic Properties of Openings at Low Frequencies", J. Sound Vib., Vol.9, No.3, pp.357-366, 1969.   DOI
12 U.S. Army Human Engineering Lab., "Maximum Noise Level for Army Materiel Command equipment", HEL Standard S-1-63B, Aberdeen Proving Ground, MD, pp.16, 1965.
13 U.S. Environmental Protection Agency, "Information on Levels of Environmental Noise Requisite to Public Health and Welfare with an Adequate Margin of Safety", U.S. EPA Office of Noise Abatement and Control, Report 550/9-74-004, 1974.
14 E. B. Shank and G. R. Grinther, "Firing from Enclosures with LAW, DRAGON an TOW", Technical Memorandum16-75, U.S. Army Human Engineering Laboratories, Aberdeen Proving Ground, MD, pp.39, 1975.
15 G. R. Garinther and K. D. Kryter, "Auditory and Acoustical Evaluation of Several Shoulder-rifles", Technical Memorandum, U.S Army Human Engineering Laboratories, Aberdeen Proving Ground, MD, pp.1-65, 1965.
16 A. Glorig, W. D. Ward and J. Nixon, "Damage Risk Criteria and Noise-induced Hearing Loss", Arch. Otolaryngol., No.74, pp.413-423, 1965.