Regulation No. 28-00 Proposed Supplement 5

Name:Regulation No. 28-00 Proposed Supplement 5
Description:Audible Warning Devices. Proposed Supplement 5 to the 00 Series.
Official Title:Proposal for Supplement 5 to the 00 Series of Amendments to Regulation No. 28 (Audible Warning Devices).
Country:ECE - United Nations
Date of Issue:2016-12-22
Amendment Level:Original
Number of Pages:33
Vehicle Types:Bus, Car, Component, Heavy Truck, Light Truck, Motorcycle
Subject Categories:Drafts and Proposals (Current)
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Keywords:

audible, warning, system, approval, device, multiple, type, vehicle, regulation, sound, production, paragraph, number, test, level, granted, vehicles, mark, means, pressure, annex, manufacturer, authority, form, rated, measured, requirements, technical, approved, devices, power, current, communication, frequency, extension, microphone, agreement, supplied, pursuant, voltage, signals, operation, measurement, categories, tests, acoustic, case, discontinued, information, applying

Text Extract:

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ECE/TRANS/WP.29/2017/3
PROPOSAL FOR SUPPLEMENT 5 TO THE ORIGINAL VERSION OF
REGULATION NO. 28
(AUDIBLE WARNING DEVICES)
ADOPTED AT THE 171 SESSION – MARCH 2017
PROVISIONAL DATE OF ENTRY INTO FORCE: OCTOBER 10, 2017

1. Scope
1.1. This Regulation applies to:
1.1.1. PART I: Approval of audible warning device, audible warning system, multiple audible
warning system supplied with direct or alternating current or compressed air, which are
intended for fitting to motor vehicles of Categories L to L , M and N, excluding mopeds
(Categories L and L );
1.1.2. PART II: Approval of motor vehicles listed in 1.1.1. with regard to fitting of devices specified
under Part I.
I. Part I. Audible Warning Device, Audible Warning System, Multiple Audible Warning
System
2. Definitions
For the purpose of this Regulation:
2.1. "Audible warning device" means a device consisting of one or several sound emission
outlets that are excited simultaneously, emitting an acoustic signal which is intended to give
audible warning of the presence of a vehicle in a dangerous road traffic situation and which
is intentionally operated by a driver;
2.2. "Audible warning system" means a combination of audible warning devices mounted on a
common bracket operating simultaneously by the actuation of a single control;
2.3. "Multiple audible warning system" means a combination of audible warning devices
capable of functioning independently;
2.4. Principles of operation of audible warning device, audible warning system, multiple audible
warning system:
2.4.1. "Pneumatic" means a principle of operation by an external compressed air source;
2.4.2. "Electro-pneumatic" means a principle of operation by a compressed air source which is
controlled by electrical supply (direct or alternating current);
2.4.3. "Electro-magnetic with resonator disc" means a principle of operation by electromagnetic
force amplified by resonator disc;
2.4.4. "Electro-magnetic with horn" means a principle of operation by electro-magnetic force
amplified by a horn;

4. Markings
4.1. Audible warning devices and each sound emitting component of an audible warning system
or multiple audible warning system excluding mounting accessories, shall bear:
4.1.1. The trade name or mark of the manufacturer and the model commercial name and/or
number;
4.1.2. The approval mark according to Paragraph 5.5.
4.2. The approval mark shall be shown on the audible warning device, audible warning system,
multiple audible warning system according to Paragraph 5.5. Each sample shall have a
space of adequate dimensions for the approval mark; this space shall be indicated in the
drawing.
4.3. All markings shall be clearly legible and indelible.
5. Approval
5.1. If the two samples submitted for approval conform to the provisions of Paragraph 6. below,
approval for this type of audible warning device, audible warning system, multiple audible
warning system shall be granted.
5.2. An approval number shall be assigned to each type approved. Its first two digits (at present
00 for the Regulation in its original form) shall indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval. The same Contracting Party may not assign this number to
another type of audible warning device, audible warning system, multiple audible warning
system.
5.3. The same approval number may be assigned to types of audible warning device, audible
warning system, multiple audible warning system differing only with respect to rated voltage,
rated sound frequency or frequencies or rated operating pressure.
5.4. Communication on approval or refusal or extension or withdrawal of approval or production
definitely discontinued of a type of audible warning device, audible warning system, multiple
audible warning system pursuant to this Regulation shall be communicated to the Parties to
the Agreement applying this Regulation by means of a form conforming to the model in
Annex 1A to the Regulation.
5.5. On every audible warning device, audible warning device, audible warning system, multiple
audible warning system which conforms to a type approved under this Regulation, there
shall be affixed conspicuously, in an easily accessible place indicated on the approval form,
an international approval mark comprising:
5.5.1. A circle containing the letter "E" followed by the distinguishing number of the country
granting approval ;
5.5.2. an approval number;
5.5.3. an additional symbol in the form of a figure in Roman numerals, showing the class to which
the audible warning device, audible warning system, multiple audible warning system
belongs.

When measuring the rated sound frequency (or frequencies), the digital sound recording
system shall have at least a 16 bit quantization. The average auto power spectrum shall be
determined, using a Hanning window and at least 66.6% overlap averages.
The instruments shall be maintained and calibrated in accordance with the instructions of
the instrument manufacturer.
6.2.1.2. Calibration of the Entire Acoustic Measurement System for a Measurement Session
At the beginning and at the end of every measurement session the entire measurement
system shall be checked by means of a sound calibrator that fulfils the requirements for
sound calibrators of at least precision Class 1 according to IEC 60942:2003. Without any
further adjustment the difference between the readings of two consecutive checks shall be
less than or equal to 0.5dB.
If this value is exceeded, the results of the measurements obtained after the previous
satisfactory check shall be discarded.
6.2.1.3. Compliance with Requirements
Compliance of the sound calibrator with the requirements of IEC 60942:2003 and
compliance of the instrumentation system with the requirements of IEC 61672-3:2013
shall be confirmed by the existence of a valid certificate of compliance.
6.2.2. Instrumentation for Other Measurements
The voltage shall be measured with instrumentation having an accuracy of ±0.05V or better.
The resistance shall be measured with instrumentation having an accuracy of ±0.01Ω or
better.
The distance shall be measured with instrumentation having an accuracy of ±5mm or better.
The time shall be measured with instrumentation having an accuracy of ±0.02s or better.
The meteorological instrumentation used to monitor the environmental conditions during the
test shall include the following devices, which meet at least the following accuracy:
(a) Temperature measuring device, ±1°C;
(b) Wind speed-measuring device, ±1.0m/s;
(c) Barometric pressure measuring device, ±5hPa;
(d) A relative humidity measuring device, ±5%."

6.3.4.2. In the case of audible warning device, audible warning system, multiple audible warning
system supplied with alternating current, the current shall be supplied by an electric
generator of the type normally used with this type of audible warning device, audible
warning system, multiple audible warning system. The acoustic characteristics of the
audible warning device, audible warning system, multiple audible warning system shall be
recorded for electric generator speeds corresponding to 50%, 75% and 100% of the
maximum speed indicated by the manufacturer of the generator for continuous operation.
During this test, no other electrical load shall be imposed on the electric generator. The
endurance test described in Paragraph 6.4. shall be carried out at a speed indicated by the
manufacturer of the equipment and selected from the above range.
6.3.5. If a rectified current source is used for the test of an audible warning device, audible warning
system, multiple audible warning system supplied with direct current, the alternating
component of the voltage measured at its terminals, when the warning devices are in
operation, shall not be more than 0.1V, peak to peak.
6.3.6. For audible warning device, audible warning system, multiple audible warning system
supplied with direct current, the resistance of the connecting leads, expressed in ohms,
including terminals and contacts, shall be as close as possible to (0.10/12) × rated voltage
in volt.
6.3.7. Under the conditions set forth above, the sound-pressure level weighted in accordance with
curve A shall not exceed the following values:
(a)
(b)
115dB(A) for audible warning device, audible warning system, multiple audible
warning system intended principally for vehicles of Categories L to L with a power
less than or equal to 7kW;
118dB(A) for audible warning device, audible warning system, multiple audible
warning system intended principally for vehicles of Categories M, N and L to L with
a power greater than 7kW.
6.3.7.1. In addition, the sound-pressure level in the frequency band 1,800 to 3,550Hz shall be
greater than that of any component of a frequency above 3,550Hz and in any event equal to
or greater than:
(a)
(b)
95dB(A) for audible warning device, audible warning system, multiple audible warning
system intended principally for vehicles of Categories L to L with a power less than
or equal to 7kW;
105dB(A) for audible warning device, audible warning system, multiple audible
warning system intended principally for vehicles of Categories M, N and L to L with
a power greater than 7kW.
6.3.7.2. Audible warning device, audible warning system, multiple audible warning system meeting
the sound characteristics mentioned in (b) may be used on the vehicles mentioned in (a).
6.3.7.3. In the case of multiple audible warning systems, the minimum values of sound pressure
level as specified in Paragraph 6.3.7.1. shall be obtained when each of the constituent units
is operated separately. The maximum values of the sound pressure level as specified in
Paragraph 6.3.7. shall not be exceeded when all the constituent units are operated
simultaneously.

6.4.3. The ambient temperature in the testing room shall be between +15 and +30°C inclusively.
6.4.4. If, after the audible warning device, audible warning system, multiple audible warning
system has been operated for half the number of times prescribed, the sound-level
characteristics are no longer the same as before the test, the audible warning device,
audible warning system, multiple audible warning system may be adjusted. After being
operated the prescribed number of times, and after further adjustment if necessary, the
audible warning device, audible warning system, multiple audible warning system must pass
the test described in Paragraph 6.3. above.
7. Modification and Extension of Approval of the Type of the Audible Warning Device,
Audible Warning System, Multiple Audible Warning System
7.1. Every modification of the type of the audible warning device, audible warning system,
multiple audible warning system shall be notified to the Type Approval Authority which
granted approval to that type of the audible warning device, audible warning system,
multiple audible warning system. This Type Approval Authority may then:
7.1.1. either take the view that the modifications made are not likely to have any appreciable
adverse effect;
7.1.2. or call for a new report from the Technical Service responsible for the tests.
7.2. Communication on confirmation of the approval, with particulars of the modifications, or of
refusal of approval shall be communicated to the Parties to the Agreement applying this
Regulation, in accordance with the procedure indicated in Paragraph 5.4. above.
7.3. The Type Approval Authority issuing the extension of approval shall assign a series number
to each communication form drawn up for such an extension.
8. Conformity of Production
The conformity of production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324 - E/ECE/TRANS/505/Rev.2) with the following requirements:
8.1. Audible warning device, audible warning system, multiple audible warning system approved
under this Regulation shall be so manufactured as to conform to the type approved by
meeting the requirements set forth in Paragraph 6. above.
8.2. The authority which has granted type approval may at any time verify the conformity control
methods applied in each production facility. The normal frequency of these verifications
shall be once every two years.
9. Penalties for Non-conformity of Production
9.1. The approval granted to a type of audible warning device, audible warning system, multiple
audible warning system pursuant to this Regulation may be withdrawn if the conditions set
forth in Paragraph 8.1. are not complied with or if the audible warning device, audible
warning system, multiple audible warning system fails to pass the checks referred to in
Paragraph 8.2. above.

13. Approval
13.1. If the vehicle type submitted for approval pursuant to this Regulation meets the
requirements of Paragraph 14. below, approval for this vehicle type shall be granted.
13.2. An approval number shall be assigned to each type approved. Its first two digits (at
present 00 for the Regulation in its original form) shall indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval. The same Contracting Party may not assign this number to
another vehicle type.
13.3. Communication on approval or extension or withdrawal of approval or production definitely
discontinued of a vehicle type pursuant to this Regulation shall be communicated to the
Parties to the Agreement applying this Regulation by means of a form conforming to the
model in Annex 1B to the Regulation.
13.4. On every vehicle which conforms to a vehicle type approved under this Regulation there
shall be affixed conspicuously, in an easily accessible place indicated on the approval form,
an international approval mark comprising:
13.4.1. A circle surrounding the letter "E" followed by the distinguishing number of the country which
has granted approval;
13.4.2. The number of this Regulation, followed by the letter "R", a dash and the approval number
placed to the right of the circle prescribed in Paragraph 13.4.1.
13.5. If the vehicle conforms to a vehicle type approved, under one or more other Regulations
annexed to the Agreement, in the country which has granted approval under this
Regulation, the symbol prescribed in Paragraph 13.4.2. need not be repeated; in such a
case the regulation and approval numbers and the additional symbols of all the Regulations
under which approval has been granted in the country which has granted approval under
this Regulation shall be placed in vertical columns to the right of the symbol prescribed in
Paragraph 13.4.
13.6. The approval mark must be clearly legible and indelible.
13.7. The approval mark shall be placed near the plate bearing the characteristics of the vehicle
and may also be affixed to this plate.
13.8. Annex 2, Section II, to this Regulation gives an example of the arrangement of the approval
mark.
13.9. The Type Approval Authority shall verify the existence of satisfactory arrangements for
ensuring effective control of the conformity of production before type approval is granted.

14.3.2. The sound pressure level and other measurements shall be made according to the
conditions specified in Paragraph 6.2. of this Regulation.
14.3.3. The A-weighted sound pressure level emitted by the audible warning device(s), audible
warning system(s), multiple audible warning system(s) fitted on the vehicle shall be
measured at a distance of 7.00 ± 0.10m in front of the vehicle (see figures in Annex 5),
which is being placed on an open site , on flat concrete or asphalt surface.
14.3.4. The microphone of the measuring instrument shall be placed approximately (±0.10m) in the
mean longitudinal plane of the vehicle;
14.3.5. Background noise and wind noise must be at least 10dB(A) below the sound to be
measured;
14.3.6. The maximum sound-pressure level shall be sought within the range of 0.5 and 1.5m above
the ground, and the height, at which the maximum sound-pressure level was found has to
be fixed for the purpose of taking the measurements prescribed below.
The sound pressure level shall be measured at that fixed height for a duration of at least 3s.
The final result shall be the maximum A-weighted sound pressure level of the reading
period, rounded mathematically to the nearest integer.
15. Modification and Extension of Approval of the Vehicle Type
15.1. Every modification of the vehicle type shall be notified to the Type Approval Authority which
granted approval to the vehicle type. This Type Approval Authority may then:
15.1.1. Either take the view that the modifications made are not likely to have any appreciable
adverse effect and that in any case the vehicle still meets the requirements; or
15.1.2. Call for a new report from the Technical Service responsible for the tests.
15.2. Communication on confirmation of approval with particulars of the modifications, or of
refusal of approval shall be communicated to the Parties to the Agreement applying this
Regulation, in accordance with the procedure indicated in Paragraph 13.3. above.
15.3. The Type Approval Authority issuing the extension of approval shall assign a series number
to each communication form drawn up for such an extension.
16. Conformity of Production
The conformity of production procedures shall comply with those set out in the Agreement,
Appendix 2 (E/ECE/324-E/ECE/TRANS/505/Rev.2) with the following requirements:
16.1. A vehicle approved under this Regulation shall be so manufactured as to conform to the
type approved by meeting the requirements set forth in Paragraph 14. above.
16.2. The Type Approval Authority which has granted type approval may at any time verify the
conformity control methods applied in each production facility. The normal frequency of
these verifications shall be once every two years.

ANNEX 1A
COMMUNICATION
(Maximum format: A4 (210 × 297mm))
issued by:
Name of administration:
.....................................
.....................................
.....................................
Concerning:
APPROVAL GRANTED
APPROVAL EXTENDED
APPROVAL REFUSED
APPROVAL WITHDRAWN
PRODUCTION DEFINITIVELY DISCONTINUED
of a type of
audible warning device
audible warning system
multiple audible warning system
for motor vehicles pursuant to Regulation No. 28
Approval No.: .002439
Extension No.: 00
Section I
0.1.
Make (trade name of manufacturer of vehicle): ..................................................................................
0.2.
Type: ....................................................................................................................................................
0.3.
Means of identification of type if marked:
.........................................................................................
0.3.1. Location of that marking: .....................................................................................................................

ADDENDUM TO THE COMMUNICATION FORM NO. 002439 , EXTENSION NO.: 00
1. Additional Information
1.1. Brief description of a principle of operation: pneumatic, electro-pneumatic, electro-magnetic
with resonator disc, electromagnetic with horn, etc.)
1.1.1. In case of audible warning system, multiple audible warning system number of devices;
1.2. Rated voltage(s), V
1.3. Rated operating pressure(s), MPa (kg/cm )
1.4. Rated sound frequency (or frequencies), Hz
1.5. Geometrical characteristics (internal length and diameter) of connecting line between
compressor or control and the audible warning device, audible warning system, multiple
audible warning system
2. Test results for each of two samples:
2.1. A-weighted sound pressure level, dB
2.2. A-weighted sound pressure level in the frequency band 1,800 to 3,550Hz, dB
2.3. Measuring rated sound frequency (or frequencies), Hz
2.4. Endurance test: passed/not passed
3. Remarks

1.10. Drawings showing the place provided for the approval number in relation to the circle of the
approval mark; the location and the appearance of trade name or mark of the manufacturer
and type or commercial description (if any); .............................................................................
1.11. A list of the components used in production, duly identified, with an indication of the
materials used; ..........................................................................................................................
1.12. Drawings in cross section and of all the components used in production. ...............................
1.13. Shape and dimensions of rigid connections for audible warning system, multiple audible
warning system. ........................................................................................................................
Signed: ......................................................................................................................................
Position in company: .................................................................................................................
Date: ..........................................................................................................................................

0.4.
Category of vehicle:
................................................................................................................
0.5.
Company name and address of manufacturer: ........................................................................
0.6.
Names and address(es) of assembly plant(s): ..........................................................................
0.7.
Name and address of the manufacturer's representative (if any): ............................................
Section II
1.
Additional information (where applicable): See Addendum
2.
Technical service responsible for carrying out the tests: ..........................................................
3.
Date of test report: ....................................................................................................................
4.
Number of test report: ...............................................................................................................
5.
Remarks (if any): See Addendum
6.
Place: ........................................................................................................................................
7.
Date: ..........................................................................................................................................
8.
Signature: ..................................................................................................................................
9.
Reasons for Extensions: ...........................................................................................................
Attachments:
Information package
Test report(s)

ANNEX 1B – APPENDIX 1
TECHNICAL INFORMATION DOCUMENT FOR TYPE APPROVAL OF
A VEHICLE WITH REGARD TO ITS AUDIBLE WARNING SIGNALS
0. General
0.1. Make (trade name of manufacturer of vehicle): ........................................................................
0.2. Type: .........................................................................................................................................
0.3. Means of identification of type if marked on the vehicle) : ......................................................
0.3.1. Location of that marking: ...........................................................................................................
0.4. Category of vehicle: ...............................................................................................................
0.5. Company name and address of manufacturer: ........................................................................
0.6. Name and address of the manufacturer's representative (if any): ............................................
0.7. Name(s) and address(es) of assembly plant(s): .......................................................................
0.8. Make (trade name (mark) of manufacturer) of audible warning device(s), audible warning
system(s), multiple audible warning system(s): ........................................................................
0.9. Type or commercial description of audible warning device(s), audible warning system(s),
multiple audible warning system(s): ..........................................................................................
0.10. Means of identification of type if marked on the audible warning device(s), audible warning
system(s), multiple audible warning system(s): .....................................................................
0.11. The approval number and issuing authority of audible warning device(s), audible warning
system(s), multiple audible warning system(s):
0.12. Rated voltage(s), V: ................................................................................................................
0.13. Type of electrical supply (direct or alternating current):
0.14. Rated operating pressure(s), MPa (kg/cm ):

ANNEX 2
ARRANGEMENTT OF THE APPROVAL MARK M
I. Arrangement
of the Approval Markk of the Audible Warning Device, Audible
System, Multiple Audible Warning System (see Paragraph 5. 5. of this Regulation)
Warning
The
above approval mark affixed to ann audible warning device shows that this audible warning
device of Classs I has been approved in the Netherlands (E4) under approval number 002439. The
first
two digits of the approval number indicate thatt the approval was granted in accordance with
the requirements of Regulation No. 28 inn its original form.
Notes: 1. The approval number must be placed close to thee circle and must be in a position
either above or below the letter "E" or to left or right of that letter. The digits of the
approval number must be on the same
side of thee letter "E" and face in the same
direction. The use of Romann numerals as approval numbers should be avoided so as
to prevent any confusion withh other symbols.
2. Approval marks of already existing types of audible warning
vehicle types may be continued to be used.
devices (systems) or
II.
Arrangement of the Approval Mark of Vehicle with Regard to its Audible Warning Signals
(see Paragraph
13.4. of this
Regulation) )
Model A
The
above approval mark affixed to a vehicle indicates that, pursuant to Regulation No. 28, this
vehicle type has
been approved in the Netherlands
(E4), with regard to its audible warning signals.
The
first two digits of the approval number indicate that Regulation No. 28 was in its original form.

ANNEX 3
QUALIFICATION CRITERIA FOR ANECHOIC ENVIRONMENT
The anechoic environment shall meet the requirements of ISO 26101:2012 with the following
qualification criteria and measurement requirements appropriate to this test method. For qualifying the
acoustic space, the following evaluation shall be conducted:
– Sound source location shall be placed in position of the audible warning device, audible warning
system, multiple audible warning system to be tested;
– Sound source shall provide a broadband input for measurement;
– Evaluation shall be conducted in one-third-octave bands;
– Microphone locations for evaluation shall be on a line from the source location to position of the
microphone used for measurement. This is commonly referred to as the microphone traverse; only
one microphone traverse line from the microphone to sound source shall be used;
– A minimum of 10 points shall be used for evaluation on the microphone traverse line. The
measurement shall start at 0.5 ± 0.05m from the sound source, and spacing shall be 0.15m
(e.g. Figure 1);
– The one-third-octave bands used to establish anechoic qualification shall be defined to cover the
spectral range of interest from 250Hz to 10kHz;
– The deviations of the measured sound pressure levels from those estimated using the inverse
square law, shall not exceed the values given in the following table.
One-third-octave-band frequency
(Hz)
Allowable deviations
(dB)
≤630 ±1.5
800 to 5,000 ±1.0
≥6,300 ±1.5

ANNEX 4
MICROPHONE POSITIONS
FOR MEASUREMENTSS OF ACOUSTICS
PARAMETERS OF AUDIBLE WARNING DEVICE, AUDIBLEE
WARNING SYSTEM, MULTIPLE AUDIBLE WARNING SYSTEM
A. In Case of an Audible Warning Devicee
All dimensions are in m

ANNEX 5
MICROPHONE POSITIONS FOR MEASUREMENTS OF
AUDIBLE
WARNING SIGNALS OF MOTOR VEHICLES V
"
Audible Warning Devices. Proposed Supplement 5 to the 00 Series.