Flyover Noise Measurements on Landing Aircraft with a Microphone Array
TLDR
In this paper, the noise sources of landing commercial aircraft were examined with planar arrays consisting of 96 or 111 microphones mounted on an 8 m by 8 m plate under the glide path on the ground.Abstract:
The noise sources of landing commercial aircraft were examined with planar arrays consisting of 96 or 111 microphones mounted on an 8 m by 8 m plate under the glide path on the ground. It is shown that important airframe noise sources can be identified in spite of the presence of engine noise, i.e., landing-gear noise, flap side-edge noise, flap-gap noise, jet-flap interaction noise, slat-horn noise, slat-track noise. A surprising finding is a noise source near the wing tips of some aircraft which is tentatively called wake-vortex wing interaction noise. It is shown to be the by far strongest noise source (6 dB(A) louder than the engines) on a regional jet aircraft.read more
Citations
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References
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Proceedings ArticleDOI
Airframe Noise Studies on Wings with Deployed High Lift Devices
TL;DR: In this article, an acoustic mirror was employed on a 1/10 scale-model wing section to identify the aeroacoustic source mechanisms of slat-noise and flap side-edge noise.
Journal ArticleDOI
Wheel/rail noise generated by a high-speed train investigated with a line array of microphones
TL;DR: In this paper, the effect of wheel-noise absorbers and freshly turned treads on radiated noise on a high-speed electric train travelling at speeds up to 250 km/h was investigated.
Journal ArticleDOI
Experiences with various configurations of microphone arrays used to locate sound sources on railway trains operated by the db ag
TL;DR: In this paper, an overview of the results and conclusions from measurements made with various configurations of microphone arrays designed to locate sound sources on trains operated by the Deutsche Bahn AG at speeds up to 280 km/h.
Journal ArticleDOI
On removing the Doppler frequency shift from array measurements of railway noise
B. Barsikow,W.F. King +1 more
Proceedings ArticleDOI
Airframe noise source localization using a microphone array
Jean-Francois Piet,Georges Elias +1 more
TL;DR: In this article, a new phased array processing method was developed to achieve accurate two-dimensional localization of acoustic sources, which is designed for sparse arrays, and uses many fewer microphones.