not really an but I can understand 120dB being harmful if you get exposed to it for a second but 90dB has to be over a 2 hour time exposure to get hearing loss.
Why is time a factor and what mechanism causes hearing loss upon being exposed to high decibles
In: 2
Sound are waves that travel across the air. Maybe an analogy to other types of waves like earthquakes or sea waves is easier to understand.
A big wave can swiftly destroy everything on its way, a smaller wave won’t destroy everything , but can still cause some damage. Exposure during long time allows this damage to accumulate and there’s a point where your body can no longer repair it. I am too ignorant to provide a more detailed answer.
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