Look up how loud everyday sounds are, and estimate the safe daily exposure time for a given decibel level using the standard 3dB exchange rate.
Occupational safety guidelines, like those from the US NIOSH, treat 85 decibels as safe for continuous exposure up to 8 hours — and for every 3 dB increase above that, the safe exposure time is cut in half, following what's called the exchange rate for noise dose.
That halving pattern exists because decibels are a logarithmic scale, not linear — a 3 dB increase represents roughly double the actual sound energy, so the safe listening duration has to roughly halve to keep the total sound energy dose the same.
Using that pattern, 88 dB is considered safe for about 4 hours, 91 dB for about 2 hours, and so on, continuing to halve for every 3 dB step up — useful for gauging how long you can safely be in a loud environment like a concert, a construction site, or using headphones at a given volume.
Because decibels measure sound energy logarithmically, and a 3 dB increase represents roughly a doubling of actual sound energy. To keep the total noise dose consistent, occupational safety guidelines like NIOSH halve the safe exposure duration for each 3 dB step up.
85 dB is the commonly cited threshold for safe exposure up to a full 8-hour workday under NIOSH-style guidelines. Louder environments require progressively shorter safe exposure times.
Normal conversation is typically around 60 dB, heavy traffic around 85 dB, and a loud concert or power tool can exceed 100-110 dB — well above the safe duration threshold for more than a few minutes.
No — it applies the standard exposure-time formula to a decibel level you enter, rather than measuring live sound. For actual sound level measurement, a dedicated sound level meter app or device would be needed.
