12.2.2.4-4 Efficacy of Hearing Protection Provided

The use of earplugs, earmuffs, or both, should be based on both the noise level and the duration of exposure. Hearing protectors selected for use should provide at least the noise attenuation at the ear as shown in Table 12.9. So long as the hearing protection levels in Table 12.9 can be met, noise cancelling headsets may also be used.1472G

 

Table 12.9 Recommended Noise Attenuation From Hearing Protectors

 

Hearing Protection

Minimum Attenuation

Ear plugs

20 dBA

Ear muffs

30 dBA

Ear plugs with ear muffs

35 dBA

Note: Source is Table XXV in MIL-STD-1472G DoD, 2012).