Application

■A-4-3 Ground-level sound monitoring

Automatic constant monitoring of aircraft noise and ground-level noise in the vicinity of an airport can be realized simultaneously by configuring a dedicated system consisting of the environmental sound monitor NA-39A. This system can automatically detect sound events and determine whether they are aircraft noise. In addition, relatively long-duration noise (ground-level noise) from aircraft taxiing, APU etc. originating within the airport site can be detected and evaluated separately as "semi-constant noise". Data can be collected on SD card media or monitored at any time via a communications link. For data processing, the aircraft noise monitoring software AS-51 is used. This version also can handle semi-constant noise.

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