Abstract

The body of information presented in this paper is directed to those individuals concerned with the increasing level of noise occurring in urban centers and the resultant implications as they relate to the human environment. The current study will document the ambient sound levels throughout the City of Toronto and the opinion of citizens regarding them. To establish the ambient sound levels, a comprehensive system for measuring sound has been established for points on a predetermined orthogonal grid superimposed on a topographical plan of the City. Measurements are made so as to provide a statistical sample of the sound level at each of these points over a period of 24 hours. These data are used to produce graphs and charts showing the range of noise levels during each sampling period, the proportion of time during which any chosen level is exceeded, daytime levels, nighttime levels, and the maximum level reached. By establishing a long-range monitoring program it will be possible to record continually a...

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