6. Monitoring engineering: long-term management
6.1 Factors influencing long-term trends
What determines the noise level of an aircraft heard on the ground? Obviously, it depends on the aircraft itself, its type, weight and engines. Figure 28 shows the average L A, max levels for each type of aircraft as an annual average, i.e. over highly representative samples of several thousand movements for each type of aircraft. Remember that a reduction of 3 dB corresponds mathematically to a division by two of the square of the sound pressure, a reduction of 6 dB to a division by four, and so on.
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Monitoring engineering: long-term management
Communication
Bibliography
Software tools
INM Integrated Noise Model 7.0 Ground noise modeling and mapping software. Published by the Federal Aviation Administration, USA. The software is now used by most countries worldwide.
Directory
Bruel & Kjaer : http://www.bksv.fr/
Norsonic : http://www.norsonic.com
Topsonic : http://www.topsystem.de
Events
INTER-NOISE : http://www.internoise2014.org/
French Acoustics Congress (CFA) : http://cfa2014.conference.univ-poitiers.fr/
Standards and norms
- Acoustics – Unattended monitoring of aircraft sound in the vicinity of airports. - ISO/CD 20906 - 2009
- Acoustics – Description, assessment and measurement of environmental noise. - ISO/DIS 1996-2.2 - 2005
- Uncertainty of measurement – Part 3: Guide to the expression of uncertainty in measurement (GUM : 1995) - ISO/IEC Guide 98-3 - 2008
- Acoustics – Procedure for describing aircraft noise heard...
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