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Aircraft Noise Monitoring System

[RD sensor] Aircraft noise discriminator Type-I

By using our original radio measurement techniques, Aircraft noise discriminator type-I (RD-90) enables an accurate automated aircraft noise measurement without human observation.

Receiving transponder radio waves produced by an aircraft, RD-90 can judge whether the target noise event is an aircraft noise or not by the correlation between the noise level and the radio wave's intensity level (Radio Wave Receiving Method). In addition, a transponder radio wave has information for air traffic control such as the flight status and the aircraft registration number. By collecting those data from every monitoring station to the central station, it enables to automatically associate noise event data with the aircraft operational modes and information including using runways, flying directions, aircraft operators, aircraft types and flight numbers.

Radio wave receiving method has a lot of advantages.

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  • By monitoring the field intensity level of transponder radio waves, it detects the approach of an aircraft.
  • It enables to identify the aircraft noise event with its aircraft identification information by the aircraft registration number within the transponder radio signals.
  • It can function regardless of the weather condition or background noise around the monitoring point.

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