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AmsterdamAirport Schiphol
Schiphol GroupAmsterdamAirport Schiphol
Statusreport CAEP/7 WG1Noise technical
ACI World Environmental Standing CommitteeGeneva, March 14, 2005Etienne van Zuijlen
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CAEP/7 wg1 Noise TechnicalAim, constitution & rapporteur
• Keep noise certification Standards (ICAO Annex 16, Volume I) up to date and effective;
• while ensuring that the certification procedures are as simple and inexpensive as possible
• experts from certificating authorities (12), manufacturers (25), airlines (3), and airport operators (1), rapporteurs from USA & The Netherlands
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CAEP/7 wg1 Noise Technical tasks & meetings
N1 Current technical issuesN2 Future of noise certification schemeN3 Aircraft type noise certification databaseN4 Monitoring Noise techologiy (with WG/3)Meetings:• 2004: 2 meetings (Sweden & Montreal)• Feb. 2005: Joint wg1&wg3 meeting • 2005: 2 meetings scheduled:
Geneva, April ‘05 & Savannah, USA, Oct ‘05)
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WG1 task identificationmain topic of 1st meeting 2004
• US: update SAE noise certification Docs: Tackle in technical issues task group
• US: CAEP aircraft noise certification database, NoiseDB (interpolation & dually (Ch2& Ch3) certified B747-100/200’s)
• US&EU: work program for rotorcraft
• US: domestic supersonic research activity: recommended practices related to supersonic
noise and sonic boom CAEP8• US&FR: ICAO noise certification workshop
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WG1 structure (task groupes)7 task areas distributed over 5 task groups
1. future noise cert. task group (FTG)2. technical issues task group (TITG)3. technology task group (TTG)4. rotercraft task group (RTG)5. supersonic transport task group
(SSTG) Session/Day Day 1 Day 2 Day 3 Day 4
Morning TITG RTG FTG SSTG
Afternoon TITG TTG FTG SSTG
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CAEP/7 wg1 Noise TechnicalWorkplan & progress in Taskgroups - FTGFTG: Future Noise Certification Scheme
(follow up on work of CAEP/6 Modernisation TG) review purpose of certification study noise problem around airports agree on role of current certification scheme
in aircraft type designDeliverables:• overall: any changes in current noise
certification scheme necessary?• in 2005: consensus on the correlation of
certification and operational noise levels, based on conclusions of 10 studied a/p’s
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CAEP/7 wg1 Noise Technical FTGcertified vs operational noise correlation
• Datacollection & methodology chosen: Take-off & approach data (cf. Annex 16) Quality of measured SEL’s (a.o. threshold) 1 dB confidence range (and 0.1dB average) Certified levels cf. Campell-Hill/NoiseDb Ranking of measured and certified data Reporting cf Spearman’s Rank-Order Compare monitored levels at different distances
• 3 studies (9 a/p) performed (US, FR, UK)• ACI/Schiphol data requested (draft paper)
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CAEP/7 wg1 Noise Technical FTGcertified vs operational noise correlation
Considerations from initial ACI-study:• Different certified noise levels for
airframe /engine combination, with ranges upto 5dB
• Monitored data confidence range <1dB• Linear average taken from certified levels• Flight paths and monitoring points are not
in “ideal” Annex 16 shematic locations• Influence of distance unclear yet
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CAEP/7 wg1 Noise Technical FTGcertified vs operational noise correlation
Conclusions from initial ACI-study:• From 3 month’s of data, only limited subset
(and influence typical period?)• Only 1 monitoring point/Rwy usefull• High variation in certified noise levels• Rank-Order applied to approach only• Monitoring points at larger distance• Better correlation with fly-over/sideline (!??)• Selection of a/c types of interest usefull• Use of mobile monitoring post & longer time
period is considered, after discussion WG1
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CAEP/7 wg1 Noise TechnicalWorkplan & progress in Taskgroups - TITG
TITG: Technical Issues Task Group• Positions, rules, guidance on
technical noise certification issues;Deliverables:
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CAEP/7 wg1 Noise TechnicalWorkplan & progress in Taskgroups - TTG
TTG: Technology Task Group• advice & information on mid- and
longterm noise reduction technology
• study relationships between noise & emissions tarde-offs
Deliverables:
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CAEP/7 wg1 Noise TechnicalWorkplan & progress in Taskgroups - RTG
RTG: Rotorcraft Task Group• technical points linked to helicopter
noise certificationDeliverables:
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CAEP/7 wg1 Noise TechnicalWorkplan & progress in Taskgroups - RTG
STG: supersonic transport task group• Monitor research into soic boom
signatures and acceptabilaty• Develop Noise Certification
Standards & Recommended Practices
Deliverables:
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Schiphol GroupCreating AirportCities
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Contact details
*******************************************************************************Etienne van Zuijlen M.Sc.
Schiphol Group - Amsterdam Airport SchipholBusiness Unit Airlines - CapacitymanagementManager Environmental Capacity
phone: +31 20 601 3479 SHG A354fax: +31 20 601 2134 Location 01-30mail: zuijlen_e@schiphol.nl PO BOX 7501web: www.schiphol.nl 1118 ZG Schiphol Airport, The Netherlands********************************************************************************