Testing and analysis techniques to measure aircraft noise primarily for purposes of noise certification as specified by the 'International Civil Aviation Organization', ICAO are described. The relevant aircraft noise certification standards and recommended practices are presented in detail for subsonic jet aircraft, for heavy and light propeller-driven aircraft, and for helicopters. The practical execution of conducting noise certification tests is treated in depth. The characteristics and requirements of the acoustic and non-acoustic instrumentation for data acquisition and data processing are discussed, as are the procedures to determine the special noise measures - effective perceived noise level (EPNL) and maximum overall A-weighted noise level (L sub pA,max) - that are required for the noise certification of different types of aircraft. The AGARDograph also contains an extensive, although selective, discussion of test and analysis techniques for more detailed aircraft noise studies by means of either flight experiments or full-scale and model-scale wind tunnel experiments. Appendices provide supplementary information.
AGARD Flight Test Techniques Series. Volume 9: Aircraft Exterior Noise Measurement and Analysis Techniques
1991
198 pages
Report
No indication
English
Aircraft , Acoustics , Aircraft noise , Certification , Civil aviation , Data acquisition , Data processing , Effective perceived noise levels , Flight tests , Noise intensity , Noise measurement , Procedures , Helicopters , Jet aircraft , Light aircraft , Subsonic flow , Wind tunnels , Foreign technology