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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/
Abstract
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/ | |||||||||
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| 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 | |||||||||
| Authors: |
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| Date: | 2017 | |||||||||
| 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 SCOPUS: | Yes | |||||||||
| In ISI Web of Science: | No | |||||||||
| Status: | Published | |||||||||
| 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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