Ecological Study of Noise Annoyance and Its Relationship with Sleep Quality of Residents adjacent to High- and Low-Traffic Roads in Yazd in 1399

Introduction: Traffic noise annoyance is one of the consequences of urban life which can have adverse effects on human health including sleep quality. The present study intends to investigate the extent of noise annoyance and its relationship with sleep quality of residents adjacent to high- and low-traffic roads in Yazd city in 1399. Methods: This was a cross-sectional study conducted in 1399 in Yazd. Data were collected using two standard questionnaires of assessing noise annoyance and Pittsburgh sleep quality. Responses were collected from residents around 10 high- and low-traffic roads, and a total of 200 samples were obtained randomly. Results: The mean score of sleep quality for all participants was 11.5 ± 35.25, and the mean score of noise annoyance was 3.73± 1.9. There was a significant difference between the average quality of sleep and the score of noise annoyance in terms the type of road (P/00.001). In general, there was also a significant and direct correlation between noise annoyance and sleep quality (r = 0.569, P = 0.001). But, the correlation between these two variables was not significant with the separation of the types of roads. Conclusion: Based on the results of the present study, the quality of sleep of residents around high traffic roads is moderate, which suggests that noise annoyance caused by traffic affects the quality of sleep. In other words, the noise annoyance caused by traffic has reduced the quality of sleep in people living adjacent to high-traffic roads.