Set 11 Problem 3 A jet plane emits P Joules of sound energy per second. a. Neglecting any absorption of sound energy by the air, what is the sound level a distance r meters away? Express your answer using the symbols P, r, and Io, where I represents is the constant given by Io = 10-12 How does sound intensity depend on distance from the source? b. Evaluate your above answer numerically using the values P = 4.7 105 J/s and r = 30 m. How does sound intensity depend on distance from the source? c. Air absorbs sound at a rate of about 7.0 dB/km. Taking into account air absorption, calculate what the sound level will be 0.83 km away. B = B = B = abc a sin(x) x10 Submit Reset All 57 Reset 0. abc sin(x) x10 Submit Reset All abc a sin(x) x10 Submit Reset All Reset 5 Reset dB dB dB How does sound intensity depend on distance from the source? b. Evaluate your above answer numerically using the values P = 4.7 105 J/s and r = 30 m. How does sound intensity depend on distance from the source? c. Air absorbs sound at a rate of about 7.0 dB/km. Taking into account air absorption, calculate what the sound level will be 0.83 km away. d. Taking into account air absorption, calculate what the sound level will be 5.7 km away. B = abc a sin(x) x10 Submit Reset All Reset dB 58 0. abc a sin(x) x10 Submit Reset All VO Reset dB 52 . abc a sin(x) x10 Submit Reset All Reset dB