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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
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 synthesized.
Inverse method, Pass-by noise, Regularisation, Tyre noise, ℓ norm
0022-460X
Papaioannou, Athanasios
28667cce-bb5f-465f-afcc-84df4e0bd290
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Cheer, Jordan
8e452f50-4c7d-4d4e-913a-34015e99b9dc
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).

Record type: Article

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 synthesized.

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Accepted/In Press date: 8 February 2020
e-pub ahead of print date: 12 February 2020
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
ORCID for Athanasios Papaioannou: ORCID iD orcid.org/0000-0003-1682-1412
ORCID for Jordan Cheer: ORCID iD orcid.org/0000-0002-0552-5506

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Date deposited: 02 Mar 2020 17:30
Last modified: 15 Sep 2021 01:57

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Contributors

Author: Athanasios Papaioannou ORCID iD
Author: Stephen Elliott
Author: Jordan Cheer ORCID iD

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