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Point of Reference
10 dBA is the sound level of normal human breathing. To put it into perspective, thunder is a whopping 120 dBA...more

Environmental Noise Levels
The max exposure time at 85 dBA is 8 hours, at 110 dBA it's just 1 min 29 seconds. If exposed, limit the time and wear hearing protection...more
Part E
Resistance of the Passage of Sound

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