SNR Value and calculation

What is a SNR Value?

SNR Value (Simplified Noise Level Reduction) is a measure of the ear protector's attenuation (reduction) of general noise.

When the noise in the workplace is measured, the ear protection SNR Value can be deducted from the measurement. The noise level must be lowered to 70-75 dB (decibels) for the ear protector to be attenuating noise sufficiently.

Calculation

See this example of the calculated noise exposure (dB) from a chainsaw:

NOISE LEVEL FROM CHAINSAW

109 dB

EAR PROTECTOR'S ATTENUATION

 (wearing, e.g. OX-ON D3 Comfort)

-  34 dB

NOISE THE EAR IS EXPOSED TO

=  75 dB