Some facts about sound levels:
Decibel is the unit for measuring the sound level. The scale goes from 0 dB which is the hearing threshold to 194 dB the loudest sound possible.
With every 10 dB the noise level doubles.
Long exposure to sound level of over 90 dB can cause hearing loss.
125 dB is the sound level where the pain starts.
Maximum permissible sound level with noise protection is 140 dB.
Check the following illustration for the common sound levels. Fenestra windows can give you noise protection from 29 to 45 dB depending on the configuration of glass.
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