Technical Bulletin

Page 4

For more information on hearing protection for indoor firing ranges and other shooting sports, read:

 Preventing Occupational Exposures To Lead and Noise At Indoor Firing Ranges. NIOSH

publication 2009-136. Available online at http://www.cdc.gov/niosh/docs/2009-136/

 Hearing Protection & the Shooting Sports. Published by the National Hearing Conservation

Association (NHCA) and the National Shooting Sports Foundation (NSSF). Available online at

https://nhca.site-ym.com/store/ViewProduct.aspx?id=1945533

The importance of proper fit

The noise reduction of earmuff-style hearing protectors may be lower when eyeglasses, goggles or

respirator straps are worn between the sealing surface of the earmuff cushions and the sides of the

wearer's head. For best noise reduction, select eyeglasses or goggles that have thin, flat temples or

straps that will minimize interference with the seal of the earmuff cushions. Pull long hair back to the

extent possible and remove other items that may degrade the earmuff seal such as pencils, hats, jewelry

or earbuds. Do not bend and reshape the headband as this will cause a loose fit and allow sound

leakage.

Earplugs should be used in accordance with the manufacturer’s instructions with special emphasis on

selection of proper size and proper depth of insertion. If using disposable foam earplugs such as the

3M™ E-A-R™ Classic™ Earplugs, it’s important to ensure that the proper technique for rolling and

compressing the plug is used to avoid creating a crease along the length of the earplug that can

degrade the noise reduction properties of the plug.

3M recommends fit testing of hearing protectors to provide a better estimate of the noise reduction

obtained by the wearer. Proper care and maintenance of hearing protectors is critical in ensuring the

device’s protective capabilities can be maximized. To learn more about fitting, care and use of hearing

protectors visit 3M online at www.3M.com/Hearing.

Flamme GA, Wong A, Liebe K, Lynd J. (2009) Estimates of auditory risk from outdoor impulse noise II: Civilian firearms. Noise

Health 11: 231-42.

Personal Safety Division

3M Center, Bldg. 235-2NW-70

St. Paul, MN 55144