Beaver Brands PPE Catalogue

DUAL PROTECTION

MAXIMUM PROTECTION BUT WITH LIMITATIONS

EXAMPLE

33dB 29dB EARPLUG EARMUFF + = 38dB MAXIMUM PROTECTION

In some environments, wearing both earplugs and earmuffs is required for maximum protection, however attenuation is limited due to flanking sound transmission paths in the skull. Therefore the attenuation values of each individual hearing protector cannot be simply added.

How to Estimate Protected Noise Level with Dual Protection - Examples

To estimate protected noise level, add 5 dB to the higher NRR (Noise Reduction Rating) protector.

20 I PERSONAL SAFETY EQUIPMENT CATALOGUE VOL 2

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