H.E. de Bree, E. Tijs

Within the JU Clean Sky Green Rotorcraft platform, the development of environmentally friendly flight paths is a major topic. The ultimate goal is to measure the noise contributions of several helicopters flying in dense traffic near a heliport at a certain listeners position. For that purpose, and other purposes, a new passive testing method is being developed based upon a pair of broad banded 3D acoustic vector sensors (AVS). It is envisaged that such a system can be used by law enforcement authorities and by airport communities to monitor the actual individual performance of helicopters and their pilots. After the invention of the Microflown sensor in 1994, acoustic particle velocity in air has become a measurable quantity next to sound pressure. Combining both sorts of transducers allows the realization of truly broad banded acoustic vector sensors, measuring both the scalar value and the vector value acoustic particle velocity in one measurement point. Vector based measurements are superior to source localization techniques based only on sound pressure (beam forming) techniques in terms of acoustic bandwidth and required channel and probe count. Also product features like minuscule size, low weight and quick set up are a great practical benefit. In this paper, the technology will be outlined and several concepts for far field sound source localization with acoustic vector sensors are shown. Furthermore, recent findings will be presented and an outlook will be given on future work.

Deutscher Luft- und Raumfahrtkongress 2009, Aachen

Conference Paper

englisch

21,0 x 29,7 cm, 6 Seiten

DGLR-Bericht, 2009, 2009-04, Deutscher Luft- und Raumfahrtkongress 2009 - Tagungsband - Ergänzung; S.1-6; 2009; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

Bestellbar

2010