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Microphone Arrays for Aeroacoustic Measurements Theory and Practice- Course Notes

Ehrenfried, Klaus and Koop, Lars and Sarradj, Ennes and Sijtsma, Pieter and Spehr, Carsten and Ahlefeldt, Thomas and Kröber, Stefan and Henning, Arne and Haxter, Stefan and Berkefeld, Tobias and Rosenstock, Catrin and Micknaus, Ilka and Otter, Dirk and Kleindienst, Tobias and Agocs, Janos (2014) Microphone Arrays for Aeroacoustic Measurements Theory and Practice- Course Notes. Course Notes 2014, Ordner.

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Official URL: http://maamcourse.dlr.de/index.php?id=54

Abstract

Aim of this course is to improve the knowledge for the practical application of microphone array measurements in wind tunnels, including the post-processing and the interpretation of the achieved results. Test engineers can participate to obtain the necessary knowledge to improve the quality of aeroacoustic measurements with microphone arrays and prevent costly errors. Contractors and end-users of array measurement results will learn how to assess the potential of aeroacoustic wind tunnel measurements and how to interpret the achieved results appropriately. In this course a knowledge base regarding the necessary theoretical background, practical knowledge about the hardware requirements and the potential of post processing will be taught. The theoretical part will concentrate on those aspects of aeroacoustics relevant to microphone array measurements. Besides giving lectures on the fundamental aspects, special emphasis will be placed on solutions of the practical problems which are faced during the implementation of this technique in wind tunnels. During practice the participants will have the opportunity in small groups to carry out recording and evaluation of data, with special emphasis being given to the impact of experimental settings on the beamforming results. The post processing and particularly the various deconvolution algorithms, including their advantages and disadvantages, will be explained and demonstrated.

Item URL in elib:https://elib.dlr.de/88353/
Document Type:Proceedings
Title:Microphone Arrays for Aeroacoustic Measurements Theory and Practice- Course Notes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deUNSPECIFIED
Koop, Larslars.koop (at) dlr.deUNSPECIFIED
Sarradj, EnnesUni BrandenburgUNSPECIFIED
Sijtsma, PieterNational Aerospace Laboratory, 8300 AD Emmeloord, The NetherlandsUNSPECIFIED
Spehr, CarstenCarsten.Spehr (at) dlr.deUNSPECIFIED
Ahlefeldt, Thomasthomas.ahlefeldt (at) dlr.deUNSPECIFIED
Kröber, StefanDaimler AGUNSPECIFIED
Henning, Arnearne.henning (at) dlr.deUNSPECIFIED
Haxter, StefanStefan.Haxter (at) dlr.deUNSPECIFIED
Berkefeld, Tobiastobias.berkefeldt (at) dlr.deUNSPECIFIED
Rosenstock, Catrincatrin.rosenstock (at) dlr.deUNSPECIFIED
Micknaus, Ilkailka.micknaus (at) dlr.deUNSPECIFIED
Otter, Dirkdirk.otter (at) dlr.deUNSPECIFIED
Kleindienst, Tobiastobias.kleindienst (at) dlr.deUNSPECIFIED
Agocs, Janosjanos.agocs (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Ordner
Editors:
EditorsEmail
Spehr, CarstenDLR, Institut für Aerodynamik und Strömungstechnik, Experimentelle Verfahren
Series Name:Course Notes 2014
Status:Published
Keywords:acoustics, aeroacoustic sources, acoustical pressure fluctuations, data analysis, hardware requirements, sensors, haystacking, shear layer correction, boundary layer effects
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:07 Oct 2014 09:50
Last Modified:02 Feb 2015 08:21

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