Andrew Huberman· PhD
Roughly speaking, 80 decibel is fine for eight hours. But for any three decibel increase, you have to half it, which means 83 decibel is okay for four hours, 86 for two hours, 89 for one hour, 92 for half an hour.
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Roughly speaking, 80 decibel is fine for eight hours. But for any three decibel increase, you have to half it, which means 83 decibel is okay for four hours, 86 for two hours, 89 for one hour, 92 for half an hour.
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So, for every three decibel increase in sound intensity, you have to half the time exposure that's safe.
avoid prolonged exposure to noise over 80 dB+ (2hr+)