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9. Simplged Method for Praslrre Colibi-otion of One-inch
9unhrd Condenser Mlovphone 41, ;ire Reciprvci~
Tecl~niqtreI,E C-402 ( 1972).
10. IEC Rrcomrnen~~~iolonrs- Soirnd Level Mcte1.s. Internationnl
Electrotechnical Cornmisaon. IEC 651 (1979).
I 1. IS0 Recommcii~lations for. Pt-gfet-red Frequencies fir
Acor~.tticnl Mensrrrenrei~ts, lntemational Organizution for
Standardization, ISOtR266- 1962(E).
12.1EC Rec-omrncndafions for Octave, Halj-Octave and
Thn-d-Ocra*e Band Filrets Inteirded jbr ihe Ana4:vis of
So~rndc and 6bratiorrv. International Electrotechnical
Commission. 1EC 225 ( 1 %6).
Note.- TJie texts andspccijicario~zusf ttrese puhlicatiotrs, as
ame~ided.a rv in~arporotedb y irfercncc itrro rhrs uttachmmr.
IEC publ~cationst ray be obtained frorn:
Central Ofice of the Intcrnauonal
Elecrtmechnical Cotll~rlisiru n
3 rue dc Vatembd
Genew, Switzerland
IS0 publicntions may be obtained from:
Internar~onnl Organization for Standardizntion
1 me dc Varembc!
Geneva, Switzerland
or frorn State IS0 mclnber bodies.
ATTACHMENT D. GUIDELINES FOR EVALUATING
AN ALTERNATIVE METHOD OF MEASURING
HELICOITER NOISE DURING APPROACH
Note.- 771u~p pnwclt rflerence pracedure 0fPat.r II. Chap c) 760 m from the intersection of the '9 approach path with
rer 8, 8.6.4 speciJes a single approach path angle. This con the ground plane.
coincide with the impuln've noise regime jov some kelicopte~s
and nor for o~kvsI.n order tho1 ofremarive merhds of establishing
complia)rcem ay be evaluated, Bares are encouroge~tlo
underrake additional meammen& as described below. 2.2 Maximum ndse levels
The following guidance material has been prepared for the use
of States when obtaining additional information on which a
future revision of the approach test procedures of Chapter 8
may be based.
2. APPROACH NOISE
EVALUATION PROCEDURE
When conducting such tests the provisions of Cbapter 8 shall
be observed except as follows.
2.1 Approach reference noise
measurement points
A flight path reference point located on the ground 120 m
(394 A) vertically below the flight paths detined UI the
approach reference procedure. On level ground this cornsponds
to the following positions:
a) 2 290 m from the intersection of the 3' approach path
with the ground plane;
b) 1 140 m fhm the intersection of the 6 O approach path
with the ground plane;
At the approach fligh~ path reference point: the noise level to
be calculated by taking the arithmetical average of the
corrected levels for 3', 6' and 9' approaches.
2 3 Approach reference procedure
The approach reference procedure shall be established as
follows:
a) the helicopter shall be stabilized and following approach
paths of 3'. 6 O and 9';
b) the approach shall be made at a ~ b i l i z e dai rspeed equal
to the best rate of clirnb speed, V,, or the lowest
approved speed for the approach, whrchever is the
greater, witb power stabrlized during the approach and
over the flight path reference point. and continued to a
normal touchdown;
c) the approacb shall be made with the rotor speed stabilized
at the maximum normal operating rpln certificated
for approach;
d) the constant approach configuration used in airworthiness
cemfication tests. with the landing gear extended,
shall be maintained throughout the approach reference
procedure; and
e) the mass of the helicopter at touchdown shall be the
maximum landing mass at which noise certification is
requested.
ANNEX 16 - VOLUME 1
ATTACHMENT E. APPLICABILITY OF ANNEX 16
NOISE CERTIFICATION STANDARDS FOR PROPELLER-DRIVEN AEROPLANES'
ANNEX 16 - VOLUME I ATT El 2411 1/05
1
Application for C of A, ekc.
of prototype accepled
on or after
1 January 1975
Application for C of A, etc.
of prolotype accepted
on or after
6 October 1977
NO YES NO YES
C of A for individual
aeroplane issued
on or aner
1 Janllary 1980
I
YES
Apgltcacahon br C of A etr
of prototype or &rived
NO version accepted on or afM
4 YES
v
Mutti-fxgine or Application for C of A, erc.
float W of prolotype accepted
or amphiban on or aRer 1 January 2M6
Application for C of A, etc.
of derived version d p c o W =pied
accepted an or after on or aher
4 November 1999 4 N~uerrbe1r 999
I
1. b s e Slanderds do not apply to
aeroplanes specifically desigmd b
aerobaUc pctrposes or aqri@Hural or
NO
fire-flghting wes or lo selfsusalnlng
powered sailplanes. ,
2. The option to apply Ihe Standards V
　
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