Question

015 10.0 points Sound waves in air are absorbed at a rate of approximately 8.48 dB/km. An explosive charge is detonated at a height of several kilo- meters in the atmosphere. At a distance of 567 m from the explosion the acoustic pres- sure reaches a maximum of 11.7 N/m”. What will be the sound level 2.14 km from

Answer 1

The pressure change by dength can be A = Ao e where. As Instial pressure A Pressure at a distame si da Attenuation coefficient = 567 m = 0.567 kom * = 8:48 dB/km 1107 = Are 8.48X0.567 8.4940.567 1433-32 N/m? . for a.s.2014 km ... . -8.48 × 2.14 . .. .. 4 - 1 3 3 2 1 e TA: 18.84*10** N/mm2]