Noise Monitoring System

Naples International Airport is one of the first airports in Italy to be equipped with a monitoring system for airport generated noise.
The system – was created in order to monitor the acoustic pressure determined by flight operations in areas in the vicinity of airports – it allows verification of landing and takeoff routes and measurement of the noise produced on the ground with the objective of minimising the environmental effects.
With implementation of the Naples airport (*) monitoring system, the following are now possible:

  • ascertainment of whether and which aircraft are compliant with specific noise abatement procedures through weekly analysis of the tracings;
  • measurement of noise produced by flight operations through the phonometer network. Continuous monitoring of acoustical effects generated by flight operations is possible by cross-referencing the information provided by these systems.

(*) During aviation activities related to emergencies, public safety, rescue and civil defence operations, no monitoring is conducted.

 

 

Monitoring of routes

As special commission (as established by article 5 of Ministerial Decree dated 31.10.1997), presided by ENAC and comprised of representatives the the of Environment, the ENAV (The Italian Air Safety Agency) the Cities of Naples, Casoria and Afragola, the Province of Naples, the Campania Region, the Ministry of the Environment, ARPAC (The Campania Regional Agency for Environmental Protection), the airlines and GESAC approved flight procedure specifications as defined by the ENAV with the objective of defining:

  • noise abatement procedures;
  • airport acoustical zoning;
  • aircraft generated-noise containment and abatement measures;

10 June, 2005 the Airport Noise Abatement Commission updated noise abatement procedures related to takeoffs in the direction of Naples which were made obligatory through the issuance of a specific NOTAM integrating noise abatement procedures –already in effect since 2002 - with new radio-assisted takeoff procedures (DME).
Noise abatement takeoff procedures take into account the need to reconcile maximum safety measures with reducing the acoustical impact on the city. This solution represents a significant reduction in the over fly area of the city and, consequently, a substantial improvement in the acoustic pressure in the urban area. Once determined conditions have been met, aircraft taking off in the direction of Naples are obliged to veer left towards the sea.
Since 17 July, the route monitoring system has been fully operational enabling GESAC to obtain radar tracings, elaborate the data into routes and inform the ENAC of any airlines not in compliance with the procedures. The ENAC, in accordance with Law 496/97 (providing for regulations which limit the acoustical pollution generated by civil aircraft), is the only authority competent to issue sanctions for non-compliance with noise abatement procedures.
As of 18 August, GESAC has provided that Airfield personnel operating directly on the aprons are to distribute notices regarding the compulsoriness of noise abatement procedures for takeoffs from runway 24 (towards the city) to aircraft preparing for takeoff.

 

 

The phonometric network

In addition to route analysis, the monitoring system for aeronautically generated noise created by the Naples airport also utilises a system of permanent phonometric detectors which constantly monitor noise levels in the area surrounding the airport complex.
Through the measuring of acoustic pressure, this system allows for the calculation of the LVA noise index, which, based upon current Italian regulations – must be adopted in order to quantify the noise produced by flight operations.
The monitoring system, purchased and installed within the framework of an agreement stipulated between GESAC and the Ministry of the Environment, passed the final testing stage.
Operation scheme
The primary components of the ground noise monitoring system are:

  • a measurement system;
  • a data communications system;
  • a data gathering and processing centre;
  • a Client system.
Measurement System
Is currently comprised of a network of 8 stations (terminals), some of them are located inside the airport complex and some in the areas surrounding the airport. Specifically P1 and P2 are positioned inside the airport complex at either end of the runway, P3 is located in the area of Capodimonte and P4 in the area of Casoria.

Each noise monitoring station/terminal is comprised of:

  • a microphone unit
  • a real-time sound level analyser (phonometer)
  • weather condition measurement sensors
  • a data collection, processing and communications system
Data communications system
Is comprised of equipment which ensures communication between the detection stations, the control centre and the remote work stations.
The Data collection and processing centre
Is comprised of a set of software and hardware required for the collection and processing of data provided by the terminals and external sources such as, for example, radar tracings.