Long-Term Follow-Up Study of Community Response to Step-Change in Aircraft Noise Exposure around Noi Bai International Airport

This paper reports a follow-up investigation of the three surveys on step-change noise impact due to the increase of flight number in Noi Bai International Airport (HNBIA) after the new terminal building opened in December 2014. The follow-up survey was conducted in November 2017, two years and 11 months after the step-change occurred. About 625 responses were obtained from 13 sites around HNBIA by interview method. Noise exposure levels was achieved by field measurement and using a noise map model. In addition to the main survey items about respondents' living conditions, noise annoyance and activity disturbance, data of residents' health conditions such as Body Mass Index and blood pressure were accessed by self-reported method. The changes in percentages of highly annoyed to noise and insomnia are found to be greatly various among sites. Nonetheless, an exposure-response relationship established in this follow-up study was found to be more parallel to that in the EU position paper than the relationships established in previous surveys but located significantly higher. In other words, though the excess response due to the step-change seems to decline over time but still stay higher than that of the steady state at the same noise exposure level.