![]() ![]() Examples of noise environments which may contain significant low-frequency components, and for which this table is not suitable, include press shops, generators and generator test bays, plant rooms, boiler houses, concrete shaker tables, moulding presses and punch presses. The information is intended as a guide rather than a substitute for using one of the standardised methods for calculating hearing protection performance, and in particular will not be appropriate if there are significant low-frequency components to the noise in question. ![]() It is based on the single number rating (SNR) value provided with a hearing protection device. So with that being said, you might be wondering how loud a particular decibel level is. The table below gives an indication of the protector factor that is likely to be suitable for different levels of noise (the noise level during a particular work task, not the daily personal noise exposure). It can be tricky to understand because its not a linear scale- a sound at 100 dB is not twice as loud as a sound at 50 dB but rather sounds about 30 times as loud. Users may become isolated from their environment, leading to safety risks, and generally may have a tendency to remove the hearing protection and therefore risk damage to their hearing. Protectors that reduce the level at the ear to below 70 dB should be avoided, since this over-protection may cause difficulties with communication and hearing warning signals.
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