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A Three-Dimensional Microphone Array for Wind Tunnel Application

Ernst, Daniel and Spehr, Carsten (2017) A Three-Dimensional Microphone Array for Wind Tunnel Application. In: INTER-NOISE 2017 - 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet. INTER-NOISE 2017, 27.-30. Aug. 2017, Hong Kong, China.

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Official URL: http://internoise2017.org/


The positions of microphones in arrays are usually distributed two-dimensionally either in a plane or on the surface of a cylinder or sphere. For such two-dimensional arrays, the determination of a point-spread function is well-known and can be used within a certain boundaries to optimize arrays in terms of minimizing the effect of side lobes in the beamforming maps. In contrary to the usual two-dimensional array configuration, the present paper outlines the development and implementation of an array for wind tunnel application where the microphones are distributed three­dimensionally. The microphone positions within this array are optimized to reduce the side lobes in three­dimensional space. This approach of using an ab initio three-dimensional distribution shows significant advantage over the combination of multiple planar arrays to form a quasi-three-dimensional microphone arrangement. The technique has been applied to wind tunnel measurements to emphasize the benefits of this approach. In the final paper, results will be shown and practical difficulties like the exact positioning of the microphone within the three-dimensional space will be discussed.

Item URL in elib:https://elib.dlr.de/118635/
Document Type:Conference or Workshop Item (Speech)
Additional Information:T8.5; Paper 158; P 6863-6870; USB Stick
Title:A Three-Dimensional Microphone Array for Wind Tunnel Application
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Journal or Publication Title:INTER-NOISE 2017 - 46th International Congress and Exposition on Noise Control Engineering: Taming Noise and Moving Quiet
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Microphone Array, Wind Tunnel
Event Title:INTER-NOISE 2017
Event Location:Hong Kong, China
Event Type:international Conference
Event Dates:27.-30. Aug. 2017
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 (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Bachmann, Barbara
Deposited On:01 Feb 2018 15:42
Last Modified:18 Jul 2019 16:05

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