Noise source localization on tyres using an inverse boundary element method

Andreas Schuhmacher, E-U Saemann, J Hald

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    A dominating part of tyre noise is radiated from a region close to the tyre/road contact patch, where it is very difficult to measure both the tyre vibration and the acoustic near field. The approach taken in the present paper is to model the tyre and road surfaces with a Boundary Element Model (BEM), with unknown node vibration data on the tyre surface. The BEM model is used to calculate a set of transfer functions from the node vibrations to the sound pressure at a set of microphone positions around the tyre. By approximate inversion of the matrix of transfer functions, the surface vibration data can then be estimated from a set of measured sound pressure data. The paper describes the different elements of this so-called Inverse Boundary Element Method (IBEM) including the measurement system, and it gives results from a verification measurement on a loudspeaker sound source. Results from tyre noise measurements will be presented at the conference.
    Original languageEnglish
    Title of host publicationProceedings from Inter-Noise 98, 16-18 November 1998
    Place of PublicationChristchurch, NZ
    Publication date1998
    Publication statusPublished - 1998
    Event27th International Congress and Exhibition on Noise Control Engineering - Christchurch, New Zealand
    Duration: 16 Nov 199818 Nov 1998
    Conference number: 27


    Conference27th International Congress and Exhibition on Noise Control Engineering
    Country/TerritoryNew Zealand

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