All measurements taken according to ISO 5130:2007(E) standards. Sound pressure level(SPL-the magnitude of sound) and Maximum sound level(LAmax) of engine and horn were measured in every selected vehicle. Nine to 16 vehicles from each category were selected (convenient sampling). METHODS: Vehicles that travel within the city of Colombo could be classified into sixteen categories based on the type (bus, motor-car, three-wheeler etc), technology (two-stroke/four-stroke, petrol/diesel) and size (light, heavy etc) of the vehicle. Objective of this study was to determine the levels of noise, emitting from vehicles which travel within the city of Colombo. Though there is widespread concern about the contribution of vehicular traffic towards noise pollution in the City of Colombo there is no reliable data on the noise emitted by different types of vehicles. INTRODUCTION: Pollution by noise is a public health problem in the city of Colombo Sri Lanka.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |