Noise Level Calculator
Add Two Sound Sources (dB)
Safe Exposure Time
Formula
Combined dB = 10 × log₁₀(10^(dB₁/10) + 10^(dB₂/10)) | Exposure halves every 3 dB above 85
Frequently Asked Questions
How loud is too loud?
85 dB and above can cause hearing damage with prolonged exposure. Safe exposure at 85 dB: 8 hours. At 88 dB: 4 hours. At 91 dB: 2 hours. At 100 dB: 15 minutes. At 110 dB: ~2 minutes. Always wear hearing protection above 85 dB.
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