Harmonoise WP 1.1 - Source characterisation of moving vehicles with 'Acoustic Camera' antenna technique
article
The aim of HARMONOISE Work Package 1.1 is the characterisation and modelling of road vehicle noise emission. Measurement of partial sources related to either the drive line or the tyre-road contact of moving vehicles and their contribution to the total vehicle pass-by noise is one of the research issues. TNO TPD has developed array measurement techniques that enable the assessment of 'calibrated' source strengths levels of moving complex sound sources and provide spatial information of the source strength distribution. The Dutch ministry of Environment (VROM) supported the application of these techniques by TNO TPD in a joint experiment with TRL within the European HARMONOISE project. The objective was to show the applicability of the methods and to demonstrate their specific features and possibilities. Data from one-dimensional (Syntacan) and two-dimensional (Acoustic Camera) antenna measurements on passing passenger cars and heavy vehicles were compared with single microphone measurement results. Based on these results it can be concluded that the Acoustic Camera and Syntacan can serve in the assessment of road vehicle noise. The methods may be used for various objectives such as monitoring of tyre-road noise and drive-line noise in real traffic and determining effects of the road surface on tyre-road noise.
TNO Identifier
237072
ISSN
16101928
Source
Acta Acustica, 89(SUPPL.)
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