Activity Disturbances by a Step Change in Aircraft Noise Exposure around Hanoi Noi Bai International Airport
* Presenting author
A new terminal building was operated at Hanoi Noi Bai International Airport (HNBIA) in December 2014 and the number of flights increased 1.2-1.3 times. In order to investigate community response to the step change in aircraft noise exposure, socio-acoustic surveys were conducted at 13 sites around HNBIA once before and twice after the operation. The sample sizes in the 1st, 2nd, and 3rd surveys were 891, 1121, and 1287, respectively. Since the usage of the two runways changed before and after the operation, the noise exposures were not monotonously increased from 1st to 2nd or 3rd surveys. Thus the difference in Lday and Lnight between before and after the operation (ΔLday and ΔLnight) ranged from -9 to 5 dB and from -2 to 8 dB, respectively. In this paper activity disturbances such as listening, resting, and sleep disturbances by the step change are investigated. As ΔLday increases, the exposure-response relationships for listening and rest disturbances become higher than that for the 1st survey even if ΔLday was minus. As ΔLnight increases, the exposure-response relationships for sleep disturbance becomes higher than that for the 1st survey when ΔLnight was plus but lower when ΔLnight was minus.