The attenuation of hearing protectors against high-level shooting impulses

• Autorzy: Toppila E. , Strack J.
• Języki publikacji: EN

Abstrakty

EN

The acoustical attenuation of five different hearing protectors were investigated using real impulses and miniature microphone technique in field conditions from a 23 mm antiaircraft cannon, from 122 mm howitzer and from an explosion of 1 kg of TNT. The measurements were carried out using voluntary military officers exposed to similar impulses in their work. The combination of earmuffs and earplugs proved to give the best attenuation. The attenuation of the earmuffs was related to the size of the cup. Light protectors gave practically no protection against the highest impulses from howitzer and TNT-blasts.

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Polska Akademia Nauk
• Czasopismo: Archives of Acoustics
• Rocznik: 2004
• Tom: Vol. 29, no. 2
• Strony: 275--282
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Toppila E.

• Institute of Occupational Health, Department of Physics, Helsinki, Finland

autor

Strack J.

• Institute of Occupational Health, Department of Physics, Helsinki, Finland

Bibliografia

• [1] 2003/10/EC, Council directive on the minimum health and safety requirements regarding to the exposure of workers to the risks arising from physical factors (noise) European Commission, Brussel 2003.
• [2] Annual Report of the Committees on treshold limit values and biological exposure indices, American Conference of Governemental Industrial Hygienists, 2003.
• [3] CHABA Proposed Damage-risk Criterion for Impulse Noise (Gunfire). Report of Working Group 57, National Academy of sciences. National Research Council. Washington DC: Committee of Hearing, bioacoustics and biomechanics, 1968.
• [4] EVANS W. A., MING H. Y., Industrial noise-induced hearing loss in Hong Kong – a comparative stude, Ann. Occup. Hyg., 25, 63–80 (1982).
• [5] KARJALAINEN A., AALTO L., JOLANKI R., MÄKINEN I., SAALO A., Ammattitaudit 2001, Työterveyslaitos 2002.
• [6] LAHIKAINEN E., SALMIVALLI A., Korvan detonaatiovammoista varusmiehillä, SotlA, 37, 140, 1962.
• [7] LIU C., PEKKARINEN J., STARCK J., Application of the probe microphone methods to measure attenuation of hearing protectors against high impulse sound levels, Appl. Acoustics, 27, 13–25 (1989).
• [8] OLAISON C. F., Bullerskador hos rekryter, Nord Audiol, 5, 85 (1962).
• [9] PEKKARINEN J., STARCK J., Hearing protection against high level shooting impulses in relation to hearing damage risk criteria, J. Acoust. Soc. Am., 91, 196–200 (1992).
• [10] PFANDER F., Das Knalltrauma, Springer Verlag, Berlin, Heidelberg, New York 1975.
• [11] Puolustusvoimat, Varomääräykset kuulonsuojaamisesta [in Finnish], 1993.
• [12] RIIHIKANGAS P., ANTTONEN H., HASSI J., SORRI M., Hearing loss and impulse noise during military service, Scand. Audiol. Suppl., 12, 292–297 (1980).
• [13] SALMIVALLI A., Acoustical trauma in regular army personnel – clinical and audiological study, Thesis University of Turku, 1967.
• [14] SAVOLAINEN S., LEHTOMÄKI K., Hearing protection in acute acoustic trauma in Finnish conscripts, Scand. Audiol., 25, 1, 53–58 (1996).
• [15] STARCK J., PEKKARINEN J., Industrial impulse noise: crest factor as an additional parameter in exposure measurements, Appl. Acoustics, 20, 263–274 (1987).
• [16] STARCK J., PEKKARINEN J., Objective measurements of hearing protector attenuation for weapons’s noise exposure, [in:] Proceedings of hearing conservation conference, OES publications, Anderson Hall University of Kentucky, 1987.
• [17] VAARANEN V., VASAMA M., JOLANKI R., TOIKKANEN J., Ammattitaudit 1991, Katsauksia 118, Työterveyslaitos 1992.