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3. Station operation
3.1 Measured values
Sound levels are measured every half-second: L A,eq, 0.5s , L eq,1/3octave between 20 Hz and 20,000 Hz in dB and PNL (Perceived Noise Level) in PNdB. The spectral weighting used for PNdB differs from that used for dB(A), so that reconciling these two quantities only makes sense within identified source categories (cf. § 6.2).
Time stamping is checked every ten minutes. Time-stamp malfunctions are recorded, as is every analyzer action (sending data, triggering automatic checks, etc.). Every hour, a sequence of raw data and associated metadata are imported into the central server. Acoustic data, acquired every half-second, and meteorological data are...
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Station operation
Data processing
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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