Ambient noise pollution is deemed as one of the major growing public health issues, especially in developing countries.Therefore, it is crucial to assess the impact of noise pollution on public health. The aim of this study is to investigate the health risk of noise exposure levels in three schools: Kaab Bin Zeyd of Basic Education (School A), Hail Al-Awamour Girls school (School B), and Al-Fikr School (School C) in Muscat, Oman. The study employed a survey of 300 students, dose-response models, and regression models to quantify health risk and to determine the relationship between noise levels and perceived noise annoyance sources. The study found average noise levels (L Aeq ) of school A (70.03 ± 8.21 dBA), school B (69.54 ± 7.75 dBA), and school C (55.95 ± 5.67 dBA) to be higher than WHO's outdoor schools environment standard of 55 dBA and European (EN16798-1) classroom's critical limits of 30-34 dBA. Most of the students from schools A (30.9%), B (33.3%), and C (63%) have reported noise produced from tra c as extremely annoyed compared to aircraft of 15.4%, 11.5%, and 27.2%, respectively. Regression analysis results showed that L Aeq explained most of the changes in variations of perceived tra c annoyance by 48.1%, 12.1%, and 13.2% for schools A (R 2 = 0.481), B (R 2 = 0.121), and C ( R 2 = 0.132), respectively. The health risk assessment results show that the percentage of highly annoyed (%HA) was higher in school A (15.2%), and school B (14.95%), than in school C (8.18%).The estimated highly sleep disturbed (%HSD) based on mean noise levels were almost the same in schools A (15.62%) and B (15.19%) but far higher compared to school C (6.01%). However, there was an association between the mean noise exposure levels and the risk of developing ischaemic heart diseases (IHD) in school A (