Aircraft Noise Assessment, Prediction and Control

Abstract

A review of the aircraft noise problem Environmental impacts of airports Description of aircraft noise Basic equations Criteria and methods of aircraft noise assessment Control of noise impact Regulations and standards for aircraft noise The main sources of aircraft noise Jet noise Fan and turbine noise Combustion chamber noise Airframe noise Propeller and helicopter noise Aircraft noise propagation Factors influencing outdoor sound Predicting the ground effect Comparisons of measured and predicted ground effects Shadow zones Classification of meteorological effects Typical sound speed profiles Sound propagation in a turbulent atmosphere Sound propagation over noise barriers Sound propagation through trees Methods for aircraft noise prediction Introduction An acoustic model of an aircraft Evaluation of an acoustic model of an aircraft Prediction of noise under the flight path: trajectory models Effects of ground, atmosphere and shielding by wing and fuselage Prediction of aircraft noise during ground operations Prediction of noise in the vicinity of an airport The influence of operational factors on aircraft noise levels Aircraft on the ground Under the flight path Takeoff and climbing Descent and landing Methods of aircraft noise reduction Reduction of noise at source Noise reduction under the flight path Noise reduction in the vicinity of an airport The efficiency of acoustic screens for reducing noise from airport ground operations Reduction of noise impact by optimum scheduling of aircraft operations Monitoring of aircraft noise Reasons for noise monitoring Instrumentation for aircraft noise monitoring Uncertainties in measurements and predictions Identifying sources of noise events Interdependencies and tradeoffs between noise and other environmental factors associated with civil aviation