Application of ℓp norm regularisation techniques in the synthesis of indoor tyre pass-by noise with the inverse method
Application of ℓp norm regularisation techniques in the synthesis of indoor tyre pass-by noise with the inverse method
Pass-by noise measurements can nowadays be realised in a laboratory environment with a microphone array and a stationary vehicle on a rolling road, according to ISO – 362–1:2016. Within this indoor testing procedure, the contributions from the various noise sources in a car can be estimated, with a set of microphones close to the various sources, and the pass-by noise then synthesised. The methods described in this paper use measured near field pressure data close to a rolling tyre at 50 km/h to estimate virtual source strength, using the inverse method, and the synthesised far field tyre noise is then compared with the one measured directly at a far field microphone array. A combination of ℓ
1 norm and ℓ
2 norm regularisation methods are investigated to optimise the equivalent source position and strength and, subsequently, the far field pass-by noise pressure estimates through the frequency range of interest. It is shown that by optimising the positions of 4 equivalent sources, acceptable representations of the measured far field spectra can be synthesised.
Inverse method, Pass-by noise, Regularisation, Tyre noise, ℓ norm
Papaioannou, Athanasios
28667cce-bb5f-465f-afcc-84df4e0bd290
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
12 May 2020
Papaioannou, Athanasios
28667cce-bb5f-465f-afcc-84df4e0bd290
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
Papaioannou, Athanasios, Elliott, Stephen and Cheer, Jordan
(2020)
Application of ℓp norm regularisation techniques in the synthesis of indoor tyre pass-by noise with the inverse method.
Journal of Sound and Vibration, 473, [115240].
(doi:10.1016/j.jsv.2020.115240).
Abstract
Pass-by noise measurements can nowadays be realised in a laboratory environment with a microphone array and a stationary vehicle on a rolling road, according to ISO – 362–1:2016. Within this indoor testing procedure, the contributions from the various noise sources in a car can be estimated, with a set of microphones close to the various sources, and the pass-by noise then synthesised. The methods described in this paper use measured near field pressure data close to a rolling tyre at 50 km/h to estimate virtual source strength, using the inverse method, and the synthesised far field tyre noise is then compared with the one measured directly at a far field microphone array. A combination of ℓ
1 norm and ℓ
2 norm regularisation methods are investigated to optimise the equivalent source position and strength and, subsequently, the far field pass-by noise pressure estimates through the frequency range of interest. It is shown that by optimising the positions of 4 equivalent sources, acceptable representations of the measured far field spectra can be synthesised.
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More information
Accepted/In Press date: 8 February 2020
e-pub ahead of print date: 12 February 2020
Published date: 12 May 2020
Additional Information:
Funding Information:
The authors gratefully acknowledge the European Commission for its support of the Marie Sklodowska Curie program through the ETN PBNv2 project ( GA 721615 ). The authors would like to thank ISVR Consulting for the loan of the volume velocity source and both Juan J. Garcia and Xavier M. Clos for their valuable help in the measurements at IDIADA.
Publisher Copyright:
© 2020 Elsevier Ltd
Keywords:
Inverse method, Pass-by noise, Regularisation, Tyre noise, ℓ norm
Identifiers
Local EPrints ID: 438126
URI: http://eprints.soton.ac.uk/id/eprint/438126
ISSN: 0022-460X
PURE UUID: 5537fec3-924a-4ebc-a265-e3bda7344af7
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Date deposited: 02 Mar 2020 17:30
Last modified: 17 Mar 2024 05:21
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Author:
Athanasios Papaioannou
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