Field experiment on the relationship of engine thrust and aircraft noise emission during take-off roll

摘要

Calculation of noise contours is usually performed using noise-distance database and performance data under assumptions of constant engine thrust and aircraft speed at each segment of a flight path. It is not certain whether those assumptions apply to the initial segment of take-off roll because of high power and acceleration. Thus, we made a field measurement, in which a lot of microphones were set up along the runway, to investigate the relationship among sound exposure level, aircraft speed and engine thrust. This paper discusses a practical procedure of calculating sound exposure level applicable to such situation, based on the result of measurements and calculations.