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Exposure to noise levels of 85 dBA is generally considered safe for up to 8 hours a day according to occupational safety guidelines. For each 3 dB increase in noise level, the safe exposure time is halved; for example, at 88 dBA, the recommended exposure time is reduced to 4 hours. Prolonged exposure can lead to hearing damage, so using hearing protection is advisable when exposed to such noise levels for extended periods.
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