statusreport caep/7 wg1 noise technical

AmsterdamAirport Schiphol

Schiphol GroupAmsterdamAirport Schiphol

Statusreport CAEP/7 WG1Noise technical

ACI World Environmental Standing CommitteeGeneva, March 14, 2005Etienne van Zuijlen

Amsterdam Airport Schiphol

2 Schiphol Group

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


3 Schiphol Group

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


6 Schiphol Group

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)


8 Schiphol Group


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


9 Schiphol Group


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:


11 Schiphol Group

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:


13 Schiphol Group

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:


14 Schiphol Group

Schiphol GroupCreating AirportCities


15 Schiphol Group

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: [email protected] PO BOX 7501web: www.schiphol.nl 1118 ZG Schiphol Airport, The Netherlands********************************************************************************

statusreport caep/7 wg1 noise technical

Documents

supersonic noise

task groupsfuture noise

operational noise levels

correlation of certification

certification procedures

technical issues task

airport operators

db averagecertified