Ambient Noise Levels after CNG Implementation in Transport Sector in Delhi

摘要

Introduction Last six decades have seen an increasing awareness in the world towards the surrounding environment. Apart from air, water and soil pollution, noise pollution, which we often ignore, has been perceived to be an important aspect in determining the quality of our environment and life. This environmental menace of noise pollution, mainly associated with urban and industrial areas, has attracted the attention of environmentalists all over the world. Almost all the activities of the modern civilization contribute their shares to the noise environment. A major factor contributing to acoustic environment in cities is the transport noise which originates from road (i.e., vehicular), air and rail traffic. Road traffic noise differs from air, and rail traffic in the way that it is spread throughout the city and continuous in nature. Road traffic noise problems arose in cities due to population increase stemming from accelerated growth, internal migration, and the increasing number of vehicles, which pour into and add to the already overcrowded streets.