Acoustics - Determination of sound power levels of noise from air-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation test room (ISO 5135:2020)

EN-ISO 5135 establishes general rules for the acoustic testing of air-terminal devices, air-terminal units, dampers and valves used in air diffusion and air distribution systems in order to determine sound power levels as defined in ISO 3741.

Akustik - Bestimmung des Schallleistungspegels von Geräuschen von Luftdurchlässen, Volumendurchflussreglern, Drossel- und Absperrelementen durch Messungen im Hallraum (ISO 5135:2020)

Dieses Dokument stellt allgemeine Regeln für die akustische Prüfung von Luftdurchlässen, Volumendurch¬flussreglern, Drossel  und Absperrelementen auf, die in Luftdiffusions- und Verteilungssystemen verwendet werden, um nach ISO 3741 festgelegte Schallleistungspegel zu ermitteln.

Acoustique - Détermination des niveaux de puissance acoustique du bruit émis par les bouches d'air, les unités terminales, les registres et clapets au moyen de mesurages en salle réverbérante (ISO 5135:2020)

Le présent document établit des règles générales relatives aux essais acoustiques des bouches d'air, des unités terminales, des registres et des clapets utilisés dans les systèmes de diffusion d'air et de distribution d'air afin de déterminer les niveaux de puissance acoustique définis dans l'ISO 3741.

Akustika - Ugotavljanje ravni zvočnih moči virov hrupa z meritvami v odmevnici za zračne izpuste ter dušilne in zaporne elemente za zrak (ISO 5135:2020)

General Information

Status
Published
Public Enquiry End Date
04-Sep-2019
Publication Date
04-Oct-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
22-Sep-2020
Due Date
27-Nov-2020
Completion Date
05-Oct-2020

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SLOVENSKI STANDARD
SIST EN ISO 5135:2020
01-november-2020
Nadomešča:
SIST EN ISO 5135:1999

Akustika - Ugotavljanje ravni zvočnih moči virov hrupa z meritvami v odmevnici za

zračne izpuste ter dušilne in zaporne elemente za zrak (ISO 5135:2020)

Acoustics - Determination of sound power levels of noise from air-terminal devices, air-

terminal units, dampers and valves by measurement in a reverberation test room (ISO

5135:2020)

Akustik - Bestimmung des Schallleistungspegels von Geräuschen von Luftdurchlässen,

Volumendurchflussreglern, Drossel- und Absperrelementen durch Messungen im
Hallraum (ISO 5135:2020)

Acoustique - Détermination des niveaux de puissance acoustique du bruit émis par les

bouches d'air, les unités terminales, les registres et clapets au moyen de mesurages en

salle réverbérante (ISO 5135:2020)
Ta slovenski standard je istoveten z: EN ISO 5135:2020
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
SIST EN ISO 5135:2020 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 5135:2020
---------------------- Page: 2 ----------------------
SIST EN ISO 5135:2020
EN ISO 5135
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 17.140.20 Supersedes EN ISO 5135:1998
English Version
Acoustics - Determination of sound power levels of noise
from air-terminal devices, air-terminal units, dampers and
valves by measurement in a reverberation test room (ISO
5135:2020)

Acoustique - Détermination des niveaux de puissance Akustik - Bestimmung des Schallleistungspegels von

acoustique du bruit émis par les bouches d'air, les Geräuschen von Luftdurchlässen,

unités terminales, les registres et clapets au moyen de Volumendurchflussreglern, Drossel- und

mesurages en salle réverbérante (ISO 5135:2020) Absperrelementen durch Messungen im Hallraum (ISO

5135:2020)
This European Standard was approved by CEN on 7 August 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5135:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 5135:2020
EN ISO 5135:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 5135:2020
EN ISO 5135:2020 (E)
European foreword

This document (EN ISO 5135:2020) has been prepared by Technical Committee ISO/TC 43 "Acoustics"

in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by

DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by March 2021, and conflicting national standards shall

be withdrawn at the latest by March 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 5135:1998.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 5135:2020 has been approved by CEN as EN ISO 5135:2020 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 5135:2020
---------------------- Page: 6 ----------------------
SIST EN ISO 5135:2020
INTERNATIONAL ISO
STANDARD 5135
Third edition
2020-08
Acoustics — Determination of sound
power levels of noise from air-
terminal devices, air-terminal units,
dampers and valves by measurement
in a reverberation test room
Acoustique — Détermination des niveaux de puissance acoustique du
bruit émis par les bouches d'air, les unités terminales, les registres et
clapets au moyen de mesurages en salle réverbérante
Reference number
ISO 5135:2020(E)
ISO 2020
---------------------- Page: 7 ----------------------
SIST EN ISO 5135:2020
ISO 5135:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 5135:2020
ISO 5135:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Acoustic test facilities and procedures .......................................................................................................................................... 2

5 Installation and operation of equipment to be tested ................................................................................................... 3

5.1 General ........................................................................................................................................................................................................... 3

5.2 Test installation of air-terminal devices, air-terminal units, dampers and valves for

measurement of the sound radiated to the reverberation test room ...................................................... 4

5.3 Test installation of air-terminal devices, air-terminal units, dampers and valves

for the measurement of the sound radiated to the reverberation test room by the

connecting duct ...................................................................................................................................................................................... 6

5.4 Test installation of air-terminal devices, air-terminal units, dampers and valves

for the measurement of the sound radiated to the reverberation test room directly

from the equipment under test................................................................................................................................................. 7

5.5 Test installation of air-terminal units for the determination of casing radiated noise ............ 8

5.6 Test procedures ...................................................................................................................................................................................... 9

6 Auxiliary facilities for acoustic testing .......................................................................................................................................10

7 Measurements and calculations ........................................................................................................................................................10

8 Measurement uncertainty .......................................................................................................................................................................11

9 Test report ................................................................................................................................................................................................................12

Bibliography .............................................................................................................................................................................................................................14

© ISO 2020 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 5135:2020
ISO 5135:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.
This document was prepared by ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.

This third edition cancels and replaces the second edition (ISO 5135:1997), which has been technically

revised. The main changes compared to the previous edition are as follows:
1) 2)

— replacement of rescinded and unavailable reference standards (ISO 5219:1984 and ISO 5220:1981 )

with currently available and up to date standards (ANSI/ASHRAE 70 and ANSI/ASHRAE 130 or

EN 12238, EN 12239 and EN 1751);

— a reference to a companion document (ISO 7235) was added to deal with transmission elements and

physical elements used in the test setup;
— a clause on uncertainty was added.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.

1) Withdrawn.
2) Withdrawn.
iv © ISO 2020 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 5135:2020
ISO 5135:2020(E)
Introduction

This document defines requirements for acoustic testing of air-terminal devices, air-terminal units,

dampers and valves used in air diffusion and air distribution systems in reverberation test rooms.

It is based on the use of ISO 3741, which describes the acoustic test facilities, instrumentation and

procedures to be used for precision grade determination of sound power levels in octave or one-third-

octave bands of a noise source.
© ISO 2020 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 5135:2020
---------------------- Page: 12 ----------------------
SIST EN ISO 5135:2020
INTERNATIONAL STANDARD ISO 5135:2020(E)
Acoustics — Determination of sound power levels of noise
from air-terminal devices, air-terminal units, dampers and
valves by measurement in a reverberation test room
1 Scope

This document establishes general rules for the acoustic testing of air-terminal devices, air-terminal

units, dampers and valves used in air diffusion and air distribution systems in order to determine

sound power levels as defined in ISO 3741.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 3741:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources

using sound pressure — Precision methods for reverberation test rooms

ISO 5167 (all parts), Measurement of fluid flow by means of pressure differential devices inserted in circular

cross-section conduits running full

ISO 7235, Acoustics — Laboratory measurement procedures for ducted silencers and air-terminal units —

Insertion loss, flow noise and total pressure loss
ANSI/ASHRAE 70, Method of Testing the Performance of Air Outlets and Air Inlets
ANSI/ASHRAE 130, Laboratory Methods of Testing Air Terminal Units

EN 1751, Ventilation for buildings — Air terminal devices — Aerodynamic testing of damper and valves

EN 12238, Ventilation for buildings — Air terminal devices — Aerodynamic testing and rating for mixed

flow application

EN 12239, Ventilation for buildings — Air terminal devices — Aerodynamic testing and rating for

displacement flow applications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2020 – All rights reserved 1
---------------------- Page: 13 ----------------------
SIST EN ISO 5135:2020
ISO 5135:2020(E)
3.1
sound pressure level

ten times the logarithm to the base 10 of the ratio of the square of the sound pressure, p, to the square

of a reference value, p , expressed in decibels
L =10lg dB
where the reference value p is 20 µPa

[SOURCE: ISO/TR 25417:2007, 2.2, modified — Notes 1 and 2 to entry have been deleted.]

3.2
sound power level

ten times the logarithm to the base 10 of the ratio of the sound power, P, to a reference value, P ,

expressed in decibels
L =10lg dB
where the reference value, P , is 1 pW

Note 1 to entry: If a specific frequency weighting as specified in IEC 61672-1 and/or specific frequency bands are

applied, this is indicated by appropriate subscripts; e.g. L denotes the A-weighted sound power level.

Note 2 to entry: This definition is technically in accordance with ISO 80000-8:2020, 8-15.

[SOURCE: ISO/TR 25417:2007, 2.9, modified - In the Note 2 to entry, the reference to ISO 80000-8 has

been updated to its latest edition.]
3.3
frequency range of interest

range that includes the octave bands with nominal mid-band frequencies between 125 Hz and 8 000 Hz

(optional between 63 Hz and 8 000 Hz) or the one-third-octave bands with mid-band frequencies

between 100 Hz and 10 000 Hz (optional between 50 Hz and 10 000 Hz)

Note 1 to entry: The user is encouraged to qualify the room in the 63 Hz octave band and include this sound.

Some equipment can generate significant sound in the 63 Hz octave band.
4 Acoustic test facilities and procedures

The acoustic test facilities, instrumentation and procedures that shall be used, including room

qualification tests, are described in ISO 3741.

This document is applicable to equipment operating under steady state conditions and with a volume

not greater than 5 % of the volume of the reverberation test room.

If the equipment is greater than 2 % up to 5 % of the room volume, then the test room shall be qualified

according to ISO 3741 with all equipment present in the room. The test facilities shall be qualified for

broad-band sound per the corresponding annex in ISO 3741.
2 © ISO 2020 – All rights reserved
---------------------- Page: 14 ----------------------
SIST EN ISO 5135:2020
ISO 5135:2020(E)
5 Installation and operation of equipment to be tested
5.1 General

5.1.1 When the equipment is mounted closer than 1,0 m to one or more reflecting planes, the sound

power level can depend strongly on the position of the equipment relative to these planes. Therefore,

install the equipment to be tested in a position representative of normal usage. Figure 1 illustrates the

overall test environment, with the specific details of each type shown in Figures 2 to 7.

Key
1 air-terminal device installed on or against a surface (see Figure 2)
2 air-te
...

SLOVENSKI STANDARD
oSIST prEN ISO 5135:2019
01-september-2019

Akustika - Ugotavljanje ravni zvočnih moči virov hrupa z meritvami v odmevnici za

zračne izpuste ter dušilne in zaporne elemente za zrak (ISO/DIS 5135:2019)

Acoustics - Determination of sound power levels of noise from air-terminal devices, air-

terminal units, dampers and valves by measurement in a reverberation test room
(ISO/DIS 5135:2019)

Akustik - Bestimmung des Schallleistungspegels von Geräuschen von Luftdurchlässen,

Volumendurchflussreglern, Drossel- und Absperrelementen durch Messungen im
Hallraum (ISO/DIS 5135:2019)

Acoustique - Détermination des niveaux de puissance acoustique du bruit émis par les

bouches d'air, les unités terminales, les registres et clapets au moyen de mesurages en

salle réverbérante (ISO/DIS 5135:2019)
Ta slovenski standard je istoveten z: prEN ISO 5135
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
91.120.20 Akustika v stavbah. Zvočna Acoustics in building. Sound
izolacija insulation
oSIST prEN ISO 5135:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 5135:2019
---------------------- Page: 2 ----------------------
oSIST prEN ISO 5135:2019
DRAFT INTERNATIONAL STANDARD
ISO/DIS 5135
ISO/TC 43/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2019-05-24 2019-08-16
Acoustics — Determination of sound power levels of noise
from air-terminal devices, air-terminal units, dampers and
valves by measurement in a reverberation test room

Acoustique — Détermination des niveaux de puissance acoustique du bruit émis par les bouches d'air, les

unités terminales, les registres et clapets au moyen de mesurages en salle réverbérante

ICS: 17.140.20
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 5135:2019(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2019
---------------------- Page: 3 ----------------------
oSIST prEN ISO 5135:2019
ISO/DIS 5135:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 5135:2019
ISO/DIS 5135:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and Definitions .................................................................................................................................................................................... 1

4 Acoustic test facilities and procedures .......................................................................................................................................... 2

5 Installation and operation of equipment to be tested ................................................................................................... 3

5.1 General ........................................................................................................................................................................................................... 3

5.2 Test installation of air-terminal units, dampers and valves for measurement of the

sound radiated to the reverberation room ..................................................................................................................... 3

5.3 Test installation of air-terminal units, dampers and valves for the measurement of

the sound radiated to the reverberation room by the connecting duct ................................................. 3

5.4 Test installation of air-terminal units for the determination of casing radiated noise ............ 4

5.5 Test procedures ...................................................................................................................................................................................... 4

6 Auxiliary facilities for acoustic testing .......................................................................................................................................... 5

7 Measurements and calculations ........................................................................................................................................................... 5

8 Measurement uncertainty .......................................................................................................................................................................... 6

9 Test report ................................................................................................................................................................................................................... 7

Bibliography .............................................................................................................................................................................................................................15

© ISO 2019 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 5135:2019
ISO/DIS 5135:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www. iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.
This document was prepared by ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.

This third edition cancels and replaces the second edition (ISO 5135:1997), of which it constitutes a

technical revision. The main changes are the following:

— Replacement of rescinded and unavailable reference standards ISO 5219:1984 and 5220:1981 with

currently available and up to date standards ANSI/ASHRAE 70 and ANSI/ASHRAE 130;

— a reference to a companion document ISO 7235 was added to deal with transmission elements and

physical elements used in the test setup;
— a clause on uncertainty was added.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www. iso .org/members. html.
iv © ISO 2019 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 5135:2019
ISO/DIS 5135:2019(E)
Introduction

This document defines requirements for acoustic testing of air-terminal units, dampers and valves used

in air diffusion and air distribution systems in reverberation rooms. It is based on the use of ISO 3741,

which describes the acoustic test facilities, instrumentation and procedures to be used for precision

grade determination of sound power levels in octave or one-third-octave bands of a noise source.

© ISO 2019 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 5135:2019
---------------------- Page: 8 ----------------------
oSIST prEN ISO 5135:2019
DRAFT INTERNATIONAL STANDARD ISO/DIS 5135:2019(E)
Acoustics — Determination of sound power levels of noise
from air-terminal devices, air-terminal units, dampers and
valves by measurement in a reverberation test room
1 Scope

This document establishes general rules for the acoustic testing of air-terminal units, dampers and

valves used in air diffusion and air distribution systems in order to determine sound power levels as

defined in ISO 3741.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 3741:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources

using sound pressure — Precision methods for reverberation test rooms

ISO 5167 (all parts), Measurement of fluid flow by means of pressure differential devices inserted in circular

cross-section conduits running full
ISO 5801, Fans — Performance testing using standardized airways

ISO 7235, Acoustics — Laboratory measurement procedures for ducted silencers and air-terminal units —

Insertion loss, flow noise and total pressure loss

ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in

me a s ur ement (GUM: 1995)
ANSI/ASHRAE 130, Laboratory Methods of Testing Air Terminal Units
ANSI/ASHRAE 70, Method of Testing the Performance of Air Outlets and Air Inlets

EN 1751, Ventilation for buildings — Air terminal devices — Aerodynamic testing of damper and valves

EN 12238, Ventilation for buildings — Air terminal devices — Aerodynamic testing and rating for mixed

flow application

EN 12239, Ventilation for buildings — Air terminal devices — Aerodynamic testing and rating for

displacement flow applications
3 Terms a nd Definitions
For the purposes of this document, the following definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:/ /www. iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
© ISO 2019 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 5135:2019
ISO/DIS 5135:2019(E)
3.1
sound pressure level

ten times the logarithm to the base 10 of the ratio of the square of the sound pressure, p, to the square

of a reference value, p , expressed in decibels
L =10lg dB
where the reference value p is 20 µPa
[2]
[SOURCE: ISO/TR 25417:2007, 2.2, modified — Notes 1 and 2 deleted.]
3.2
sound power level

ten times the logarithm to the base 10 of the ratio of the sound power, P, to a reference value, P ,

expressed in decibels
L =10lg dB
where the reference value, P , is 1 pW
[3]

Note 1 to entry: If a specific frequency weighting as specified in IEC 61672-1 and/or specific frequency bands

are applied, this is indicated by appropriate subscripts; e.g. L denotes the A-weighted sound power level.

[1]

Note 2 to entry: This definition is technically in accordance with ISO 80000-8:2007, 8-23.

[2]
[SOURCE: ISO/TR 25417:2007, 2.9]
3.3
frequency range of interest

the range which includes the octave bands with nominal mid-band frequencies between 125 Hz

and 8 000 Hz (optional between 63 Hz and 8000 Hz) or the one-third-octave bands with mid-band

frequencies between 100 Hz and 10 000 Hz (optional between 50 Hz and 10 000 Hz)

Note 1 to entry: The user is encouraged to qualify the room in the 63 Hz octave band and include this sound.

Some equipment can generate significant sound in the 63 Hz octave band.
3.4
r ever b er a nt s ou nd f ield

that portion of the sound field in the test room over which the influence of sound received directly from

the source is negligible
[SOURCE: ISO 3741:2010, 3.7]
4 Acoustic test facilities and procedures

The acoustic test facilities, instrumentation and procedures to be used, including room qualification

tests, are described in ISO 3741.

This document is applicable to equipment operating under steady state conditions and with a volume

not greater than 5% of the volume of the reverberation room.

If the equipment is greater than 2% up to 5% of the room volume then the test room shall be qualified

according to ISO 3741 with all equipment present in the room. The test facilities shall be qualified for

broad-band sound per the corresponding annex in ISO 3741.
2 © ISO 2019 – All rights reserved
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oSIST prEN ISO 5135:2019
ISO/DIS 5135:2019(E)
5 Installation and operation of equipment to be tested
5.1 General

5.1.1 When the equipment is mounted closer than 1,5 m to one or more reflecting planes the sound

power level can depend strongly on the position of the equipment relative to these planes. Therefore,

install the equipment to be tested in a position representative of normal usage. Figure 1 illustrates the

overall test environment, with the specific details of each type shown in Figures 2 to 6.

Reflecting planes may, for practical reasons, be simulated by panels with an area-related mass greater

than 7 kg/m . Such panels shall extend at least 1,5 m in all directions measured from any edge of the

device under test. These panels shall be vibration isolated from the equipment under test. If such a

panel is used, the room with the reflecting panel shall be qualified for broad-band sound per the

corresponding annex in ISO 3741.

5.1.2 Supply air to the equipment under test or exhaust air from it through a test installation in

accordance with either ANSI/ASHRAE 130 and ANSI/ASHRAE 70 or EN 12238, EN 12239, and EN 1751.

If EN 12238, EN 12239, and EN 1751 are followed, the airflow rate shall be measured using instruments

in accordance with the ISO 5167- series or other instruments which have equivalent calibrated

performance.

5.1.3 Include air-flow control accessories (dampers, deflectors, straighteners, equalizers, etc.)

normally used in conjunction with the equipment under test in the test set-up. Locate and set them in the

same manner as recommended for the application of the equipment.

5.2 Test installation of air-terminal units, dampers and valves for measurement of the

sound radiated to the reverberation room

5.2.1 Position air-terminal devices normally installed in a boundary surface no closer than 1,5 m to

the intersection of any adjacent surface and away from any position of boundary surface symmetry, as

shown in Figure 2.

5.2.2 Mount air-terminal devices normally used at the intersection of two surfaces at the intersection

of the t
...

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