Development of CPX technique in measuring tyre/road noise in Hong Kong

Wing Tat Hung, Ching Fai Ng, Wing Gun Wong, Mike Ming Kan Law, Ka Yee Ho, Chi Kin Randolph Leung

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

2 Citations (Scopus)

Abstract

Measuring and subsequent abating tyre/road noise in density populated areas in Hong Kong is an acute problem. A CPX trailer was fabricated by the Hong Kong Polytechnic University in 2007. The trailer successfully passed all the specified certification tests and was used to measure the tyre/road noise in the past two years. The trailer however still has some limitations; the most critical one being single test wheel which can only travel in the middle of the lane, not on the wheel track. A CPX vehicle with two test wheels is being developed. This CPX vehicle has many special features including auto lifting devices for "wheel lifting" certification test, an additional acoustic cover to reduce the influence of bearing noise, pavement temperature and tyre pressure monitoring devices and web-cams monitoring the tyre/road contact points. Tests on the sound reflection of foams in a mock-up the acoustic enclosure and the effectiveness of the acoustic shield for reducing bearing noise have been performed in the laboratory. Results show that both designs are able to pass the certification tests.
Original languageEnglish
Title of host publication38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Pages2576-2583
Number of pages8
Volume4
Publication statusPublished - 1 Dec 2009
Event38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009 - Ottawa, ON, Canada
Duration: 23 Aug 200926 Aug 2009

Conference

Conference38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009
Country/TerritoryCanada
CityOttawa, ON
Period23/08/0926/08/09

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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