Physics Sound Problem?
One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26-27, 1883. According to barometric measurements, the sound had a decibel level of 180 dB at a distance of 161 km. Assuming the intensity falls off as the inverse of the distance squared, what was the decibel level on Rodriguez Island, 4,800 km away?
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Help: "Damping of sound level with distance":
http://www.sengpielaudio.com/calculator-distance.h...
Use the first calculator and enter:
Distance r1 = 161 000 m
Level L1 = 180 dB
Distance L2 = 4800 000 m
Answer: L2 = 150 dB
The sound level on Rodriguez Island was 150 dB.
You can find there the formulas for calculation.
Cheers ebs