Certifying a twin-wheeler CPX vehicle for tyre/road noise measurement

Wing Tat Hung, Yat Ken Lam, Chung Fai Ng, Chi Kin Randolph Leung, Ka Yee Ho, Emily Fung

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

A twin-wheeler tyre/road noise measuring vehicle with a trailing acoustic enclosure was designed and fabricated in Hong Kong in 2009. This vehicle has undergone the specified certification tests in the draft ISO/CD 11819-2 for measuring tyre/road noise at Close Proximity (CPX). The first test ensures minimal reflections within the acoustic enclosure. An artificial omni-directional sound source was devised and placed at the tyre/road contact patch to mimic the noise source. The noise measured with and without the enclosure was compared. The second test is for ensuring the background noise from the test vehicle itself is negligible compared to the tyre/road noise. A long trailer was specifically designed to perform the "removed" tyre testing runs. The noises measured with and without the two test tyres on the same porous asphalt road section were compared. The third test ensures that the noise from the on-road pass-by vehicles has minimal effect on the measured tyre/road noise. The noises measured when the CPX vehicle was parked on the near side lanes were compared to that measured when the CPX vehicle ran on the same road sections. The results show that the devices tailored made for these certification tests worked well; this twin-wheel CPX vehicle successful passed all certification tests and these specified certification tests are practicable.
Original languageEnglish
Title of host publication40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Pages537-544
Number of pages8
Volume1
Publication statusPublished - 1 Dec 2011
Event40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan
Duration: 4 Sep 20117 Sep 2011

Conference

Conference40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Country/TerritoryJapan
CityOsaka
Period4/09/117/09/11

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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