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Decibel Reference Guide
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About Decibel Reference Guide
Reference guide of common sound levels in dB SPL with real-world examples and OSHA exposure limits.
How It Works
Browse sound levels from 0 dB (hearing threshold) to 194 dB with real-world examples and OSHA exposure limits.
Frequently Asked Questions
When does hearing damage occur?
Prolonged exposure above 85 dB SPL. OSHA limits: 85dB/8hr, 88dB/4hr, 91dB/2hr — halving for each 3 dB.
How loud is a concert?
Rock concerts: 100-120 dB SPL. At 100 dB, OSHA limits to 2 hours. Always use hearing protection.