Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2006.05a
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- Pages.421-427
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- 2006
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- 1598-2548(pISSN)
A Study on the Evaluation Method of Sound Power for a Travelling Vehicle Using CPX and Pass-by Measurements
CPX 및 Pass-by 계측을 이용한 단독 주행 차량의 음향파워 평가 방법에 관한 연구
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Choi, Tae-M.
;
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Mun, Sung-H.
;
- Seo, Young-G. ;
-
Kim, Jin-H.
;
- Kim, Byung-H. ;
- Bae, Hyo-J. ;
- Cho, Dae-S.
-
최태묵
((주)크리에이텍)
;
-
문성호
(한국도로공사 도로교통기술원 포장연구그룹)
;
- 서영국 (한국도로공사 도로교통기술원 포장연구그룹) ;
-
김진형
((주)크리에이텍)
;
- 김병희 (부산대학교 조선해양공학과) ;
- 배효준 (부산대학교 조선해양공학과) ;
- 조대승 (부산대학교 조선해양공학과)
- Published : 2006.05.01
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 au vehicle types, has a strong merit to be able to evaluate sound power levels for any combination of vehicle categories and traffic volumes.