Abstract
A major field study of human responses to traffic noise has been completed on 1200 subjects. Sites for noise and human response measurements were chosen on a deterministic basis so that the research was as much as possible a controlled experiment. Human response measurements were obtained from interviewer-administered questionnaires, and noise data from several days of digitally recorded data near the subjects' homes. Controlled variables included: type of road, size of community, type of dwelling, and socio-economic status. As a part of the overall study a number of traffic noise measures were evaluated as predictors of annoyance and activity disturbances. In general, the simpler measures (percentile levels and energy average level), were quite successful. Little improvement was gained by the use of the more complex measures incorporating terms relating to the fluctuating component of the noise. Data supporting the day—night sound level concept was obtained. [Supported by the Canadian Ministry of Transport.]
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