King Power

Hearing Protection

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Overprotection can be a problem!

Selecting a high NRR hearing protector for an environment where only good high frequency attenuation is needed, will lead to unnecessary insulation and communications difficulties

How to use the NRR

When the dB(C) noise level is known, you don’t have to adjust the NRR:
Noise level at ear: dB(C) – NRR =< 90 dB (*)
When the noise level is known in dB(A) the NRR must be reduced by 7 dB:
Noise level at ear: dB(A) – [NRR -7] =< 90 dB (*)
(*) If a threshold shift (hearing damage) exists the noise level at the ear must be 85 dB or less.


3M™ Foam Ear Plug

Uncorded – 200 pairs per box
Corded – 100 pairs per box
Tapered shape to ft the ear canal comfortably
Soft foam seals the ear comfortably
Smooth, dirt resistant surface for hygiene
Comfortable for a wide range of ear sizes
Hypo-allergenic material
Bright orange color for visibility


Over-the-Head Earmuffs

Optime 98
Lightweight – headband
NRR 25 dB
Dual low pressure bands improve comfort
Broad foam cushions provide low surface pressure


Helmet Attachable

Optime 105
Twin-Cup® – headband
NRR 29 dB
Patented Twin-Cup® design
Highest NRR for any ear muff tested by an accredited lab


3M™ Reusable Ear Plug Corded

Individually packed – 100 pairs/box
Reusable, multi-fange designed ear plug
Fits securely in the ear canal and helps provide
reliable protection
Bright orange color provides high visibility to
allow employers to indentify employees wearing
their ear plugs.
Soft cloth cord helps prevent loss of ear plugs.
Can be washed and reused many times.
Noise Reduction Rating (NRR)*: 24dB