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http://dx.doi.org/10.5050/KSNVN.2006.16.11.1124

A Study on the Evaluation Method of Sound Power for a Travelling Vehicle Using CPX and Pass-by Measurements  

Choi, T.M. ((주)크리에이텍)
Moon, S.H. (한국도로공사 도로교통기술원 포장연구그룹)
Seo, Y.G. (한국도로공사 도로교통기술원 포장연구그룹)
Kim, J.H. ((주)크리에이텍)
Kim, B.H. (부산대학교 조선해양공학과)
Bae, H.J. (부산대학교 조선해양공학과)
Ji, W.J. (부산대학교 조선해양공학과)
Cho, D.S. (부산대학교 조선해양공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.16, no.11, 2006 , pp. 1124-1131 More about this Journal
Abstract
This paper presents a novel method to determine sound power level(PWL) emitted by a travelling vehicle for road traffic noise simulation. The PWL is evaluated by the equivalent sound pressure level (SPL) measured by close proximity method and the sound power correction factor derived from the maximum SPL measured by pass-by method and the propagation attenuation of vehicle noise during the pass-by measurement. Using the method, we derive the empirical formula for PWL estimation in 1/1-octave and overall frequency bands for 8 vehicles (automobile, SUV, small truck, large bus, trailer, 3 dump trucks) tested at two road surfaces (dense graded asphalt, 30mm transverse tinning concrete) of Korean highway test road. The suggested approach, if securing sufficient data to represent the acoustic characteristics of all vehicle types, has il strong merit to be able to evaluate sound power levels for any combination of vehicle categories and traffic volumes.
Keywords
Vehicle Noise; Sound Power; Pass-by and CPX Measurement;
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  • Reference
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