In monitoring the impact of the noise level caused by actions within the airport area, Nakhon SI thammarat, and air freight centre. Chef ron company under the control of the Department of civil aviation has made an impact on the sound from the helicopter company. Chef ron coupled with the flight of the airliner service of Nakhon SI thammarat airport. Using a mathematical model Integrated Noise Model (INM), which is the model that is used widely in aerospace engineering. The result of the chamlong is proposed in the form of an evaluation unit, defined as Noise Exposure Forecast is standard (NEF), which is calculated from the Effective Perceived Noise Level (EPNL) by measuring sound to each type of aircraft.
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