Kröber, Stefan and Ehrenfried, Klaus and Koop, Lars (2008) Design and testing of sound sources for phased microphone array calibration. bebec2008 Berlin Beamforming Conference, 2008-02-19 - 2008-02-20, Berlin (Germany). ISBN 978-3-00-023849-9.
Full text not available from this repository.
Abstract
The phased array technique is a powerful tool for the localisation and quantification of sound sources in aeroacoustic testing. The accuracy of the results is limited due to phase and sensitivity errors of the microphones. A reliable calibration procedure for the microphone array would enhance the applicability of the measurement technique. Currently, appropriate sound sources are lacking, especially for in-flow calibration. An ideal calibration sound source exhibits monopole characteristics and covers a frequency range up to 70 kHz. The present study reviews concepts for omni-directional sound sources and evaluates their capability for microphone array calibration. Two concepts of calibration sources with aerodynamic fairings for the use in wind tunnels have been developed. The radiated sound field of both probes was examined in experiments in an anechoic facility. The presented results comprise the spatial amplitude characteristics of the designed sound sources. In addition, beamforming with a synthetic microphone array was performed to analyse the phase characteristics.
Item URL in elib: | https://elib.dlr.de/53342/ | ||||||||||||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||||
Title: | Design and testing of sound sources for phased microphone array calibration | ||||||||||||||||
Authors: |
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Date: | 2008 | ||||||||||||||||
Refereed publication: | No | ||||||||||||||||
Open Access: | No | ||||||||||||||||
Gold Open Access: | No | ||||||||||||||||
In SCOPUS: | No | ||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||
Page Range: | pp. 1-18 | ||||||||||||||||
Series Name: | CD-ROM Conference Proceedings | ||||||||||||||||
ISBN: | 978-3-00-023849-9 | ||||||||||||||||
Status: | Published | ||||||||||||||||
Keywords: | microphone array, aeroacoustic | ||||||||||||||||
Event Title: | bebec2008 Berlin Beamforming Conference | ||||||||||||||||
Event Location: | Berlin (Germany) | ||||||||||||||||
Event Type: | international Conference | ||||||||||||||||
Event Start Date: | 19 February 2008 | ||||||||||||||||
Event End Date: | 20 February 2008 | ||||||||||||||||
Organizer: | DLR, TU-Berlin; GFaI | ||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||
HGF - Program Themes: | Aircraft Research (old) | ||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||
DLR - Program: | L AR - Aircraft Research | ||||||||||||||||
DLR - Research theme (Project): | L - Flight Physics (old) | ||||||||||||||||
Location: | Göttingen | ||||||||||||||||
Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Helicopters Institute of Aerodynamics and Flow Technology > Experimental Methods | ||||||||||||||||
Deposited By: | Micknaus, Ilka | ||||||||||||||||
Deposited On: | 28 Jul 2008 | ||||||||||||||||
Last Modified: | 24 Apr 2024 19:16 |
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