Detailed directivity measurements of aerodynamic sound sources

Elliott, AS ORCID: https://orcid.org/0000-0003-4894-0053, Meggitt, JWR ORCID: https://orcid.org/0000-0002-6665-2939 and Moorhouse, AT ORCID: https://orcid.org/0000-0002-4034-1091 2015, Detailed directivity measurements of aerodynamic sound sources , in: Noise and Vibration - Emerging Technologies, 13-15 April 2015, Dubrovnik, Croatia.

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Abstract

The sound radiated by a vibrating surface can be modelled using combinations of elementary sources but for aerodynamic noise sources it less clear how to do so. It is proposed here that the arrangement and number of ideal sources required to represent aerodynamic sources may be revealed by their directivity pattern. Presented in this paper are some aerodynamic sound source directivity results obtained from a loudspeaker robot in the University of Salford’s full anechoic chamber. This novel use of the apparatus can produce plots of sound pressure amplitude on a spherical surface obtained by incrementally rotating the aerodynamic sound source with respect to a fixed microphone. Balloon plots of aerodynamically generated sound source directivity are presented and the representation of aerodynamic sound sources using elementary sources or multipoles is discussed.

Item Type:	Conference or Workshop Item (Paper)
Schools:	Schools > School of Computing, Science and Engineering
Journal or Publication Title:	Noise and Vibration - Emerging Technologies
Funders:	Innovate UK, Dyson
Depositing User:	Dr Andrew Elliott
Date Deposited:	03 Mar 2017 10:14
Last Modified:	16 Feb 2022 18:16
URI:	https://usir.salford.ac.uk/id/eprint/41459

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