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Microphone Arrays for Aeroacoustic Measurements - Theory and Practice

Ahlefeldt, Thomas and Spehr, Carsten and Dougherty, Robert and Ehrenfried, Klaus and Ernst, Daniel and Haxter, Stefan and Koop, Lars and Raumer, Hans-Georg and Sarradj, Ennes and Sijtsma, Pieter and Fuchs, Carsten and Kleindienst, Tobias and Mattner, Hartmut and Otter, Dirk and Kunis, Armann and Rosenstock, Catrin and Micknaus, Ilka (2018) Microphone Arrays for Aeroacoustic Measurements - Theory and Practice. MAMM-Course Notes 2018, Ordner.

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Official URL: http://maamcourse.dlr.de/

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/124255/
Document Type:Proceedings
Title:Microphone Arrays for Aeroacoustic Measurements - Theory and Practice
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ahlefeldt, Thomasthomas.ahlefeldt (at) dlr.dehttps://orcid.org/0000-0002-2869-2665
Spehr, Carstencarsten.spehr (at) dlr.deUNSPECIFIED
Dougherty, RobertOptiNav Inc.UNSPECIFIED
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deUNSPECIFIED
Ernst, Danieldaniel.ernst (at) dlr.deUNSPECIFIED
Haxter, StefanStefan.Haxter (at) dlr.deUNSPECIFIED
Koop, Larslars.koop (at) dlr.deUNSPECIFIED
Raumer, Hans-Georghans-georg.raumer (at) dlr.deUNSPECIFIED
Sarradj, EnnesTU BerlinUNSPECIFIED
Sijtsma, PieterPSA3UNSPECIFIED
Fuchs, Carstencarsten.fuchs (at) dlr.deUNSPECIFIED
Kleindienst, Tobiastobias.kleindienst (at) dlr.deUNSPECIFIED
Mattner, Hartmuthartmut.mattner (at) dlr.deUNSPECIFIED
Otter, Dirkdirk.otter (at) dlr.deUNSPECIFIED
Kunis, Armannarmann.kunis (at) dlr.deUNSPECIFIED
Rosenstock, Catrincatrin.rosenstock (at) dlr.deUNSPECIFIED
Micknaus, Ilkailka.micknaus (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Course Notes 2018, Ordner
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Series Name:MAMM-Course Notes 2018, Ordner
Status:Published
Keywords:acoustics, aeroacoustic sources, beamforming, acoustical pressure fluctuations, data analysis, hardware requirements, sensors, haystacking, shear layer correction, boundary layer effects, teaching, signal processing
Institution:Deutsches Zentrum für Luft- und Raumfahrt e.V.
Department:AS-EXV
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 for Aerodynamics and Flow Technology > Experimental Methods, GO
Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Micknaus, Ilka
Deposited On:10 Jan 2019 06:24
Last Modified:10 Jan 2019 06:24

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