decibels
10 - 20Wristwatch
20 - 30Rustling of leaves
30 - 40Whispering
40 - 50Quiet residential area.
50 - 60Normal conversation
60 - 70Radio at living room volume
70 - 80Typewriter
80 - 90Busy road
90 - 100Circular saw
100 - 110Drill
110 - 120Live rock band
120 - 130Jet engine
130 - 140Pain limit
Extended exposure to a noise level over 80 decibels can result in damage to the hearing.
If the noise level gets above 80 decibels, the employer must provide hearing protection!
If the noise level gets above 90 decibels, the EMPLOYEE MUST wear hearing protection!
What does SNR-value mean?
SNR is a single number rating system (Single Number Rating), according to the international standard ISO 4869. The tests are carried out by commercial laboratories that operate independently of the manufacturers.
The SNR-value is expressed in decibels (dBs) and is used as a guide for comparing the degree of sound-reducing capabilities of the different hearing protectors. The SNR-value is subtracted from the measured sound level to measure the degree of sound attenuation at the ear when wearing the hearing protector.