To study the acoustic field of propelled light aircraft, a method of in-flight measurements was implemented. The separation of noise sources is achieved by examination of the influence on the acoustic field on the relative set-up of the propeller and the engine. This shows that at high rotational speed, the propeller is the dominant source. Evaluating then the field due to steady/unsteady loading on the blades, one concludes that the former ones are the most acoustically efficients. The analysis fly-over noise measurements, using an original signal processing (doppler effect compensation) makes the results obtained more complete. (Krautzig)
Propeller light aircraft noise at discrete frequencies
Propellergeraeusch von Leichtflugzeugen bei diskreten Frequenzen
AIAA-Papers ; 1-10
1980
10 Seiten, 21 Bilder, 8 Quellen
Conference paper
English
Propeller light aircraft noise at discrete frequencies
AIAA | 1980
|Propeller Light Aircraft Noise at Discrete Frequencies
AIAA | 1981
|NTIS | 1994
|British Library Conference Proceedings | 1994
|Noise Evaluation of Light Propeller-Driven Aircraft
British Library Conference Proceedings | 1992
|