0.0002 dynes/cm2)b

4-engine turbojet, 400' altitude, takeoff

117 dBC

115 PNdB

4-engine turbofan, 400' altitude, approach

105 dBC

122 PNdB

4-engine turbojet, 4000' laterally, takeoff

96 dBC

105 PNdB

4-engine turbofan, 4000' laterally, approach

70 dBC

79 PNdB

Engine run-up, small business jet (1000')

106 dBA

119 PNdB

Noise level inside airplane in flight, as high as

90 dBA

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