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Microphone-array processing for wind-tunnel measurements with strong background noise

Koop, Lars and Ehrenfried, Klaus (2008) Microphone-array processing for wind-tunnel measurements with strong background noise. 14th AIAA/CEAS Aeroacoustics Conference, 2008-05-05 - 2008-05-07, Vancouver (Canada).

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Official URL: http://www.aiaa.org

Abstract

During the last decade, microphone arrays became a standard tool to study aeroacoustic sources. Nowadays, arrays are frequently applied in fly-over measurements<sup>1</sup> and wind tunnel testing.<sup>2</sup> To improve the resolution of the arrays and to reduce disturbing side lobes in the measured source maps, sophisticated deconvolution methods were proposed<sup>3-8</sup> in recent years. First, these methods were tested using synthetic data or data from experiments with generic configurations. <sup>8</sup> In a next step the methods have to be applied to real experiments. This is done in the present paper. It is tested, if the deconvolution works also under difficult conditions, and if the findings of the simulations using artificial background noise<sup>7</sup> can be confirmed in case of real data.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Microphone-array processing for wind-tunnel measurements with strong background noise
Authors:
AuthorsInstitution or Email of Authors
Koop, LarsUNSPECIFIED
Ehrenfried, KlausUNSPECIFIED
Date:2008
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Session 16-AA-16
Page Range:pp. 1-20
Series Name:AIAA Conference Proceedings CD-ROM
Status:Published
Keywords:microphone-array, closed test-section, deconvolution, DAMAS, aeroacoustic noise sources, SCCH-model, BiClean, background noise
Event Title:14th AIAA/CEAS Aeroacoustics Conference
Event Location:Vancouver (Canada)
Event Type:international Conference
Event Dates:2008-05-05 - 2008-05-07
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:13 Jun 2008
Last Modified:27 Apr 2009 14:52

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