INVESTIGATION OF EAR PLUGS FOR PROTECTION AGAINST GUN BLAST
ARMY MEDICAL RESEARCH LAB FORT KNOX KY
Pagination or Media Count:
Acoustic protection is needed for all personnel who are regularly exposed to the noise of gun fire or to blast. The characteristics and course of the temporary loss are like that following exposure to sustained high noise levels. Expedients in current use cotton and waste are unsanitary and not entirely reliable. Of the plugs tested, NODS, and the baffled rubber stopper were inadequate and impractical to use. M.S.A. Ear Defenders, N.D.R.C. Ear Wardens and Sepco Plugs provide the best protection against temporary loss. Sepco plugs are somewhat less satisfactory because of higher attenuation of speech.
- Protective Equipment