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The impact of airport noise on the healthy life of residents in surrounding communities is more and more prominent.To solve the noise problem,we must first monitor the aircraft noise. Use dual-core 24-bit delta-sigma AD acquisition technology in the airport noise real-time monitor system,and achieved the high speed acquisition and real-time calculation of aircraft noise data by using the computing power of DSP. Aircraft noise event is identified by using parameters such as calculated time-level curves,and the parameters such as sound exposure level and sound pressure are sent to the cloud for processing through the network ,which get the necessary reference documents for airport noise management.