Experimental Observations on the Aural Effects of Gunblast

Murray, Nancy; Reid, Gavin

doi:10.5694/j.1326-5377.1946.tb33744.x

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Hearing Loss1

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1948

1970

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Cited by 11 publications

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“…For all of the nine men exposed to as much as 8 psi peak overpressure under controlled conditions, the V-51R Ear Plug afforded better than the equivalent of 20 dB noise level attenuation (the difference between 1.5 and 8 psi). At least four of the nine men exposed to 1.5 psi without protection could be expected to suffer permanent hearing losses if regularly exposed to this condition (8).…”

Section: Hearing Lossmentioning

confidence: 99%

Effectiveness of the v-51r Ear Plug With Impulse Pressures Up to 8 Psi

Jacobson¹,

Dyer²,

Marone³

1962

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The protection which the V-51R Ear Plug provides against high-intensity impulse noise was determined for simulated rapid-fire field conditions. Twenty enlisted men were exposed to 2, 4, and 6 pounds per square inch peak overpressures generated by a 105mm howitzer. Their temporary threshold shifts were then measured at 2000 and 4000 cycles per second. The results indicated that inserting the V-51R Ear Plug without checking its fit does not give adequate protection to all personnel. It was also found that a protection-checked ear (ear plug inserted to minimize the level of a reference sound) gave adequate protection with impulse pressures up to 8 psi.iii CONTENTS ABSTRACT .

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Section: Hearing Lossmentioning

confidence: 99%