Z. Hu, J. Yin, Q. Zhang

A new diagnostic method based on the two microphone cross spectral acoustic intensity technique was applied to identificate the cabin noise source paths. The simulating test using a loudspeaker and an electro-mechanical shaker to simulate the airborne and structureborne noise sources was conducted to prove the confidence of the proposed method. The results show that the discrepancy between measured and separated values of total average acoustic intensity level are respectively 1.7dB(A) and 0.4dB(A) for structureborne and airborne components, which is acceptable for engineering application. The static test with engine in operation shows that the airborne noise through the rear board of cabin is the dominant contributor to cabin noise . This is a reasonable result, which gives a guide to cabin noise control treatment.

DGLR/AIAA 14th Aeroacoustics Conference, 1992

Conference Paper

englisch

21,0 x 29,7 cm, 5 Seiten

DGLR-Bericht, 1992, 1992-03, DGLR/AIAA 14th Aeroacoustics Conference - Proceedings; S.97-101; 1992; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroacoustics

Bibliothek

1992