Combat Arms Earplug
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Combat Arms Earplug. Hearing Conservation Department of Preventive Medicine Winn Army Community Hospital Ft. Stewart, GA. Hearing Conservation POC. CPT Jillyen Curry: 370-6916 Email: [email protected] SGT Mary Knaff: 370-5590 Email: [email protected]

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Combat Arms Earplug

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Combat arms earplug

Combat Arms Earplug

Hearing Conservation

Department of Preventive Medicine

Winn Army Community Hospital

Ft. Stewart, GA


Combat arms earplug

Hearing Conservation POC

  • CPT Jillyen Curry: 370-6916

  • Email: [email protected]

  • SGT Mary Knaff: 370-5590

  • Email: [email protected]


Combat arms earplug

U.S. ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE

COMBAT ARMS EARPLUG

  • Insert YELLOW plugs for weapons fire in dismounted mode.

  • Insert OLIVE DRAB plugs for steady state noise in and around aircraft, noisy vehicles and watercraft, etc.

  • Keep filter holes free of earwax and other debris.

  • Check proper insertion for slight tension by gently tugging on plugs.

  • Ensure that plugs are cleaned with soap and water and dry when returned to case.

NSN 6515-01-466-2710


Combat arms earplug

U.S. ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE

The Problem and the Ideal

Solution

“Earplugs or muffs appear to be counter-indicated, with regard to speech communication in the situation where they are probably needed most – namely, in the presence of intermittent, impulsive noise, such as gunfire. Here, the wearer of earplugs or muffs cannot hear weak speech during silent intervals between impulses. The ideal solution would be a nonlinear device that would let weak sounds through at full strength but would attenuate intense sounds.” pp. 68-69

K.D. Kryter, The Effects of Noise on Man (1970) Academic Press


Combat arms earplug

U.S. ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE

Figure 6

Insertion Loss and NR peak afforded by the ISL-EAR Ultrafit earplug for different levels of the impulses (1/3 oct. bands). Insertion Loss afforded by the ISL-EAR Ultrafit earplug when measured with a pink noise at 100 dB (full line and diamonds). Insertion Loss afforded by the original EAR Ultrafit earplug when measured with a pink noise at 120 dB (full line and squares).

(after Dancer)


Combat arms earplug

1000m

900m

800m

700m

600m

500m

400m

300m

200m

100m

0m

U.S. ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE

Detection of Sound by

Open Normal Ear

Combat Arms Earplug

Foam Earplug

Riflebolt Closing

1000m

Truck

800m

Truck

800m

Riflebolt Closing

500m

Truck

400m

Riflebolt Closing

Army Research Laboratory Data

60m

Low Suburban Environmental Noise with Acceptable (H-1 Profile) Hearing Ability


Combat arms earplug

U.S. ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE

COMBAT ARMS EARPLUG

  • Insert YELLOW plugs for weapons fire in dismounted mode.

  • Insert OLIVE DRAB plugs for steady state noise in and around aircraft, noisy vehicles and watercraft, etc.

  • Keep filter holes free of earwax and other debris.

  • Check proper insertion for slight tension by gently tugging on plugs.

  • Ensure that plugs are cleaned with soap and water and dry when returned to case.

NSN 6515-01-466-2710


Combat arms earplug

Hearing Conservation

is

Combat Readiness Medicine

Army Regulations

AR 385-10

AR 40-5

DA Pam 40-501


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