Buses and coaches built in 1966 show little improvement and sometimes deterioration from noise point of view when compared with their predecessors of 30 yr ago; areas and means of improvements are discussed together with various methods of testing vehicle noise such as acceleration test, which Ministry of Transport plans to use; with regard to permissible noise level, it is expected that limit will be set at 87 db (A) for existing and 85 db (A) for new vehicles; research made in reducing engine and combustion noise by means of modifications to combustion chamber and fuel injection process; boxing-in of engines is studied as means of reducing vehicle 's external noise level.


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    Title :

    Let's have less noise


    Additional title:

    Bus Coach


    Contributors:

    Published in:

    Bus and Coach ; 38 , n 6 ; p 190-194


    Publication date :

    1966


    Size :

    5 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


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