30. Intensity of Various Sounds Example P (in sound- pressure units) Log P Decibels Softest detectable sound Soft whisper Quiet neighborhood Average conversation Loud music from a radio Heavy automobile traffic Very loud thunder Jet airplane taking off Loudest rock band on record Spacecraft launch 9 from 150 ft. 1 10 100 1000 10,000 100,000 1,000,000 10,000,000 100,000,000 1,000,000,000 0 1 2 3 4 5 6 7 8 9 0 20 40 60 80 100 120 140 160 180