A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology

Thesis (M.Eng.) - Asian Institute of Technology, 1979

Among other sources of noise, the aircraft noise has created a serious problem in Bangkok Metropolitan areas. During the past decade, the number of commercial aircraft movements at Bangkok International Airport has rapidly increased. According to statistics, the annual commercial aircraft flights in this airport has increased from 21,000 in 1964 to 47,054 flights in 1977. This enormous increase of flights together with the introduction of heavier aircrafts has brought the necessity of assessing the noise level at this airport and establishing guidelines for control. To accomplish the requirement of noise assessment particularly in the absence of any other information, a study was carried out at Bangkok Inter national Airport. The noise level of all the aircrafts being operated at Bangkok International Airport were measured. This included the determination of occupational noise level at the airport. Further the evaluation of ambient noise was also included for the aerodrome. Based upon the operational information (take-offs and landings), Noise Exposure Forecast Con tours (NEF) have also been developed. As a result of the study it is inferred that, if no measures are taken, the land area within NEF-30 contour can be expected to be double by 1988 and meanwhile there are plans to build many schools, few hospitals and commercial buildings in this area. Further situation was the worst at the area within NEF-40 contour right under the takeoff path, approximately 3 km from the end of runways. However, areas subjected to aircraft approach noise were generally less polluted. Finally it was recommended to implement some operational control such as increasing the present glide slope angle, practicing STOL (Short Takeoff and Landing), VTOL (Vertical Takeoff and Landing) and non-operational as land management; acoustic treatment of the existing schools, hospitals and other designated noise-sensitive structures so as to control the noise levels within the acceptable range.