Decibel Distance Calculator
Inverse-square law · 10 ft reference
The rated output on the horn's spec sheet
How far away the listener is
At 100 ft, you'll hear
~130dB
Roughly the same as: Jackhammer (close) (130 dB)
Ring chart
Rings show how dB drops with distance around the source. The dashed circle marks your chosen distance.
Where it sits on the scale
The OSHA permanent damage threshold starts at 85 dB with long exposure and drops to seconds at 110+ dB.