oSIST prEN 12102-1:2021

Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers with electrically driven compressors - Determination of the sound power level - Part 1: Air conditioners, liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers

This European Standard establishes requirements for determining, in accordance with a standardized procedure, the sound power level emitted into the surrounding air by air conditioners, heat pumps, liquid chilling packages with electrically driven compressors when used for space heating and/or cooling, and/or for process, as described in the EN 14511 series and dehumidifiers as described in EN 810.
This European Standard also covers the measurement of the sound power level of evaporatively cooled condenser air conditioners, as defined in EN 15218. However, the measurement will be done without external water feeding and these units will thus be considered as the other air conditioners covered by the EN 14511 series.
It is emphasized that this measurement standard only refers to airborne noise.

Luftkonditionierer, Flüssigkeitskühlsätze, Wärmepumpen, Prozesskühler und Entfeuchter mit elektrisch angetriebenen Verdichtern - Bestimmung des Schallleistungspegels - Teil 1: Luftkonditionierer, Flüssigkeitskühlsätze, Wärmepumpen zur Raumbeheizung und -kühlung, Entfeuchter und Prozesskühler

Dieses Dokument legt Anforderungen fest, nach denen der von Luftkonditionierern, Wärmepumpen und Flüssigkeitskühlsätzen mit elektrisch angetriebenen Verdichtern zur Raumbeheizung und/oder  kühlung und/oder Prozesskühlern nach der Normenreihe prEN 14511 und Entfeuchtern nach EN 810, an die umgebende Luft abgegebene Schallleistungspegel nach einem genormten Verfahren ermittelt wird.
Dieses Dokument behandelt auch die Messung des Schallleistungspegels von Luftkonditionierern mit verdunstungsgekühltem Verflüssiger nach EN 15218. Die Messung muss jedoch ohne Wasserzuleitung von außen durchgeführt werden; diese Geräte werden daher wie die sonstigen in der Normenreihe prEN 14511 behandelten Luftkonditionierer betrachtet.
Es wird darauf hingewiesen, dass sich diese Messnorm ausschließlich auf den Luftschall bezieht.

Climatiseurs, groupes refroidisseurs de liquide, pompes à chaleur, refroidisseurs industriels et déshumidificateurs avec compresseur entraîné par moteur électrique - Détermination du niveau de puissance acoustique - Partie 1 : climatiseurs, groupes refroidisseurs de liquide, pompes à chaleur pour le chauffage et le refroidissement, déshumidificateurs et refroidisseurs industriels

Le présent document établit les exigences de détermination, suivant un mode opératoire normalisé, du niveau de puissance acoustique émis dans l’air environnant par les climatiseurs, pompes à chaleur ou groupes refroidisseurs de liquide avec compresseur entraîné par moteur électrique, lorsqu’ils sont utilisés pour le chauffage et/ou le refroidissement d’un espace, pour le et/ou les refroidisseurs industriels, comme décrit dans la série prEN 14511, et par les déshumidificateurs comme décrits par l'EN 810.
Le présent document couvre également le mesurage du niveau de puissance acoustique des climatiseurs à condenseur refroidi par évaporation, comme défini dans l’EN 15218. Cependant, le mesurage est réalisé sans alimentation d’eau externe et ces appareils seront alors considérés comme les autres climatiseurs couverts par la série prEN 14511.
Il est souligné que la présente norme de mesure se réfère uniquement au bruit aérien.

Klimatske naprave, enote za hlajenje kapljevine, toplotne črpalke, procesne hladilne naprave in razvlaževalniki z električnimi kompresorji - Določanje ravni zvočne moči - 1. del: Klimatske naprave, enote za hlajenje kapljevine, toplotne črpalke za ogrevanje in hlajenje prostora, razvlaževalniki in procesne hladilne naprave

General Information

• Status: Not Published
• Public Enquiry End Date: 01-Jun-2021
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 23.120 - Ventilators. Fans. Air-conditioners
• ICS: 27.080 - Heat pumps
• Technical Committee: OGS - Heating for buildings
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 25-Mar-2021
• Due Date: 12-Aug-2021
• Completion Date: 24-Jun-2021
• Directive: 2016/2281 - Commission Regulation (EU) 2016/2281 of 30 November 2016 implementing Directive 2009/125/EC of the European Parliament and of the Council establishing a framework for the setting of ecodesign requirements for energy-related products, with regard to ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coil units
• Directive: 206/2012 - Commission Regulation (EU) No 206/2012 of 6 March 2012 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for air conditioners and comfort fans
• Directive: 626/2011 - Commission Delegated Regulation (EU) No 626/2011 of 4 May 2011 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to energy labelling of air conditioners
• Directive: 811/2013 - Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heater, temperature control and solar device and packages of combination heater, temperature control and solar device
• Directive: 813/2013 - Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters
• Mandate: M/488 - Mandate to CEN, CENELEC and ETSI in the field of air conditioners and comfort fans
• Mandate: M/535 - [C(2016)2626) Standardisation request to the European standardisation organisations to draft harmonised European standards pursuant to Article 10(1) of Regulation (EU) No 1025/2012 of the European Parliament and of the Council in support of implementation of Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to eco-design requirements for space heaters and combination heaters and Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heaters, temperature control and solar device and packages of combination heater, temperature control and solar device
• Mandate: M/560 - [C(2019) 1725 final] Ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coils in support of Commission Regulation (EU) 2016/2281
• Ref Project: prEN 12102-1 - Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers with electrically driven compressors - Determination of the sound power level - Part 1: Air conditioners, liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers

RELATIONS

• Revised: SIST EN 12102-1:2018 - Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers with electrically driven compressors - Determination of the sound power level - Part 1: Air conditioners, liquid chilling packages, heat pumps for space heating and cooling, dehumidifiers and process chillers
• Effective Date: 01-May-2021

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 12102-1:2021
01-maj-2021
Klimatske naprave, enote za hlajenje kapljevine, toplotne črpalke, procesne
hladilne naprave in razvlaževalniki z električnimi kompresorji - Določanje ravni
zvočne moči - 1. del: Klimatske naprave, enote za hlajenje kapljevine, toplotne
črpalke za ogrevanje in hlajenje prostora, razvlaževalniki in procesne hladilne
naprave

Air conditioners, liquid chilling packages, heat pumps, process chillers and dehumidifiers

with electrically driven compressors - Determination of the sound power level - Part 1: Air

conditioners, liquid chilling packages, heat pumps for space heating and cooling,

dehumidifiers and process chillers

Luftkonditionierer, Flüssigkeitskühlsätze, Wärmepumpen, Prozesskühler und Entfeuchter

mit elektrisch angetriebenen Verdichtern - Bestimmung des Schallleistungspegels - Teil

1: Luftkonditionierer, Flüssigkeitskühlsätze, Wärmepumpen zur Raumbeheizung und -

kühlung, Entfeuchter und Prozesskühler

Climatiseurs, groupes refroidisseurs de liquide, pompes à chaleur, refroidisseurs

industriels et déshumidificateurs avec compresseur entraîné par moteur électrique -

Détermination du niveau de puissance acoustique - Partie 1 : climatiseurs, groupes

refroidisseurs de liquide, pompes à chaleur pour le chauffage et le refroidissement,

déshumidificateurs et refroidisseurs industriels
Ta slovenski standard je istoveten z: prEN 12102-1
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
27.080 Toplotne črpalke Heat pumps
oSIST prEN 12102-1:2021 en,fr,de

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

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oSIST prEN 12102-1:2021
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oSIST prEN 12102-1:2021
DRAFT
EUROPEAN STANDARD
prEN 12102-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2021
ICS 17.140.20; 27.080 Will supersede EN 12102-1:2017
English Version
Air conditioners, liquid chilling packages, heat pumps,
process chillers and dehumidifiers with electrically driven
compressors - Determination of the sound power level -
Part 1: Air conditioners, liquid chilling packages, heat
pumps for space heating and cooling, dehumidifiers and
process chillers

Climatiseurs, groupes refroidisseurs de liquide, Luftkonditionierer, Flüssigkeitskühlsätze,

pompes à chaleur, refroidisseurs industriels et Wärmepumpen, Prozesskühler und Entfeuchter mit

déshumidificateurs avec compresseur entraîné par elektrisch angetriebenen Verdichtern - Bestimmung

moteur électrique - Détermination du niveau de des Schallleistungspegels - Teil 1: Luftkonditionierer,

puissance acoustique - Partie 1 : climatiseurs, groupes Flüssigkeitskühlsätze, Wärmepumpen zur

refroidisseurs de liquide, pompes à chaleur pour le Raumbeheizung und -kühlung, Entfeuchter und

chauffage et le refroidissement, déshumidificateurs et Prozesskühler
refroidisseurs industriels

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 113.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

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.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12102-1:2021 E

worldwide for CEN national Members.
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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 7

2 Normative references .................................................................................................................................... 7

3 Terms, definitions and symbols ................................................................................................................. 8

3.1 Terms and definitions ................................................................................................................................... 9

3.2 Symbols, subscripts and units .................................................................................................................... 9

3.2.1 General ................................................................................................................................................................ 9

3.2.2 Non ducted units ........................................................................................................................................... 10

3.2.3 Ducted units ................................................................................................................................................... 10

4 Measuring instruments .............................................................................................................................. 10

5 Operation of the unit ................................................................................................................................... 12

6 Installation of the unit ................................................................................................................................ 14

6.1 General ............................................................................................................................................................. 14

6.2 Ducted units ................................................................................................................................................... 14

6.2.1 Installation ..................................................................................................................................................... 14

6.2.2 Duct end correction ..................................................................................................................................... 15

6.2.3 Bend correction ............................................................................................................................................ 16

6.2.4 Pressure and airflow measurements .................................................................................................... 17

6.2.5 Casing radiated test ..................................................................................................................................... 17

6.3 Wall mounted units ..................................................................................................................................... 17

6.4 Ceiling mounted units................................................................................................................................. 17

6.5 Window-type units ...................................................................................................................................... 17

6.6 Multisplit systems ........................................................................................................................................ 17

6.7 Single duct units ........................................................................................................................................... 18

6.7.1 Noise radiated by the casing .................................................................................................................... 18

6.7.2 Noise from duct outlet ................................................................................................................................ 18

7 Acoustic measurement methods ............................................................................................................ 18

7.1 Frequency range ........................................................................................................................................... 18

7.2 Method selection .......................................................................................................................................... 19

7.2.1 General ............................................................................................................................................................. 19

7.2.2 Target of measurement .............................................................................................................................. 19

7.3 Diffuse field methods .................................................................................................................................. 19

7.3.1 General ............................................................................................................................................................. 19

7.3.2 Non ducted units ........................................................................................................................................... 19

7.3.3 Ducted units ................................................................................................................................................... 20

7.4 Installation of the free field over a reflecting plane method ........................................................ 21

7.4.1 General ............................................................................................................................................................. 21

7.4.2 Reference surface ......................................................................................................................................... 21

7.4.3 Measuring surface ........................................................................................................................................ 21

8 Uncertainty of measurement results .................................................................................................... 23

9 Test report ...................................................................................................................................................... 24

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9.1 General ............................................................................................................................................................. 24

9.2 Unit specification .......................................................................................................................................... 24

9.3 Operating conditions, installation and environmental conditions ............................................ 24

9.4 Measurement instruments ........................................................................................................................ 24

9.5 Measured values and results .................................................................................................................... 24

Annex A (normative) Specific measurement for staged or variable capacity units ............................ 26

A.1 General requirements ................................................................................................................................. 26

A.2 Test mode ........................................................................................................................................................ 26

A.3 Measurements process for variable capacity units .......................................................................... 26

A.4 Additional requirements applying to Ecodesign and Energy labelling regulations ............. 26

A.4.1 General ............................................................................................................................................................. 26

A.4.2 Variable capacity units ............................................................................................................................... 26

A.4.3 Staged capacity units ................................................................................................................................... 27

Annex B (informative) Typical configurations of air conditioners and heat pumps ........................... 28

B.1 General ............................................................................................................................................................. 28

B.2 Air-to-air units ............................................................................................................................................... 28

B.3 Air-to-water(brine) units .......................................................................................................................... 30

B.4 Water(brine)-to-water(brine) units ...................................................................................................... 31

B.5 Water(brine)-to-air units .......................................................................................................................... 32

Annex C (normative) Sound power lever of indoor units of wter-to-air and air-to-air heat

pumps and air conditioners ...................................................................................................................... 33

C.1 General ............................................................................................................................................................. 33

C.2 Operation of the indoor unit ..................................................................................................................... 33

C.3 Configurations and measurements ........................................................................................................ 34

C.3.1 Non ducted indoor units ............................................................................................................................. 34

C.3.2 Ducted indoor units ..................................................................................................................................... 34

Annex ZA (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) No 206/2012 aimed to be covered ............. 35

Annex ZB (informative) Relationship between this European Standard and the energy

labelling requirements of Commission Delegated Regulation (EU) No 626/2011

aimed to be covered ..................................................................................................................................... 36

Annex ZC (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) No 813/2013 aimed to be covered ............. 37

Annex ZD (informative) Relationship between this European Standard and the energy

labelling requirements of Commission Delegated Regulation (EU) No 811/2013

aimed to be covered ..................................................................................................................................... 38

Annex ZE (informative) Relationship between this European Standard and the ecodesign

requirements of Commission Regulation (EU) 2016/2281 aimed to be covered ................. 39

Bibliography ................................................................................................................................................................. 41

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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)
European foreword

This document (prEN 12102-1:2021) has been prepared by Technical Committee CEN/TC 113 “Heat

pumps and air conditioning units”, the secretariat of which is held by UNE.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12102-1:2017.
The main changes with respect to the previous edition are listed below:

– addition of Annex C describing the sound power lever of indoor units of water-to-air and air-to-air

heat pumps and air conditioners;

– update of Annex A regarding specific measurement for staged or variable capacity units;

– addition of Annex ZE relating to Commission Regulation (EU) No 2016/2281 aimed to be covered.

This document has been prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Regulation(s).

For relationship with EU Regulation(s), see informative Annex ZA, Annex ZB, Annex ZC, Annex ZD and

Annex ZE, which are an integral part of this document.
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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)
Introduction

This document offers ways to determine the sound power level of air conditioners, liquid chilling

packages, heat pumps, and dehumidifiers with electrically driven compressors. Some of them are

specifically adapted to provide results with low uncertainties, by using laboratory class acoustic methods

and highly controlled operating conditions. Those measurements are suitable for certification, labelling

and marking purposes.

In some cases, the target and/or the environment of the measurements do not allow such precision-class

methods. This document also offers ways to assess sound power levels with acceptable accuracy even

though acoustic methods and/or operating conditions are not laboratory-type, e.g. in situ or quality

control measurements.

This document gives two classes of measurements and results, according to the test environment:

— Class A measurements correspond to controlled operating conditions (standard or application rating

conditions). It is defined by the respect to the tolerances of Table 2 and is intended to be used for the

conformity to requirements of:
— Commission Regulation (EC) No 206/2012 of 6 March 2012 implementing Directive

2009/125/EC of the European Parliament and of the Council with regard to ecodesign

requirements for air conditioners;

— Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing

Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy

labelling of space heaters, combination heaters, packages of space heater, temperature control

and solar device and packages of combination heater, temperature control and solar device;

— Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive

2009/125/EC of the European Parliament and of the Council with regard to ecodesign

requirements for space heaters and combination heaters.

— Commission Regulation (EU) 2016/2281 of 30 November 2016 implementing Directive

2009/125/EC of the European Parliament and of the Council establishing a framework for the

setting of ecodesign requirements for energy-related products, with regard to ecodesign

requirements for air heating products, cooling products, high temperature process chillers and

fan coil units.

— Class B measurements correspond to the case where the range defined by the tolerances of Table 2

cannot be fulfilled.

In both classes, precision or engineering class acoustic methods need to be applied. The choice of the

acoustic measurement method is done in accordance with EN ISO 3740 and the EN ISO 9614 series

depending on the type of surrounding acoustic fields (diffuse or free field, enclosed or open space), and

the available instrumentation. The reference of acoustic standard needs to be reported with explicit

mention of its accuracy class, whatever the current operating conditions.

The use of EN ISO 3746 and EN ISO 3747 as survey grade methods is not recommended due to the high

level of uncertainties. Their use is only allowed for non-controlled environments when they fulfil the

engineering grade requirement.
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prEN 12102-1:2021 (E)

Three methods for determining the sound power levels are specified in order to avoid unduly restricting

existing facilities and experience:

— the first methodology is based on reverberation room measurement (see EN ISO 3741 and the

EN ISO 3743 series);

— the second method is based on measurements in an essentially free field over a reflecting plane (see

EN ISO 3744 and EN ISO 3745);

— the third method is based on sound intensity measurement (see the EN ISO 9614 series) preferably

in a free field environment.

The necessity to maintain the test conditions obviously leads to recommend test methods implemented

in acoustically designed (enclosed) spaces, such as EN ISO 3741, the EN ISO 3743 series, EN ISO 3745 and

also the EN ISO 9614 series when implemented in an enclosed space.

The open spaces will be used only in specific cases, e.g. when the size or the capacity of the unit under

test cannot be managed by standard test rooms. Suitable test methods are EN ISO 3744 and the

EN ISO 9614 series.

NOTE Intensity measurement methods are quite robust and are well suited for tests to be done in

environments without or with a light acoustic treatment (the better the acoustic treatment, the easier the

implementation).
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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)
1 Scope

This document establishes requirements for determining, in accordance with a standardized procedure,

the sound power level emitted into the surrounding air by air conditioners, heat pumps, liquid chilling

packages with electrically driven compressors when used for space heating and/or cooling, and/or for

process, as described in the prEN 14511 series, and dehumidifiers, as described in EN 810.

This document also covers the measurement of the sound power level of evaporatively cooled condenser

air conditioners, as defined in EN 15218. However, the measurement will be done without external water

feeding and these units will thus be considered as the other air conditioners covered by the prEN 14511

series.
It is emphasized that this measurement standard only refers to airborne noise.
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.

EN 810:1997, Dehumidifiers with electrically driven compressors - Rating tests, marking, operational

requirements and technical data sheet

prEN 14511-1:2021, Air conditioners, liquid chilling packages and heat pumps for space heating and

cooling and process chillers, with electrically driven compressors - Part 1: Terms and definitions

prEN 14511-2:2021, Air conditioners, liquid chilling packages and heat pumps for space heating and

cooling and process chillers, with electrically driven compressors - Part 2: Test conditions

prEN 14511-3:2021, Air conditioners, liquid chilling packages and heat pumps for space heating and

cooling and process chillers, with electrically driven compressors - Part 3: Test methods

prEN 14511-4:2021, Air conditioners, liquid chilling packages and heat pumps for space heating and

cooling and process chillers, with electrically driven compressors - Part 4: Requirements

prEN 14825:2020, Air conditioners, liquid chilling packages and heat pumps, with electrically driven

compressors, for space heating and cooling - Testing and rating at part load conditions and calculation of

seasonal performance

EN 15218:2013, Air conditioners and liquid chilling packages with evaporatively cooled condenser and with

electrically driven compressors for space cooling - Terms, definitions, test conditions, test methods and

requirements

FprEN 16583:2021, Heat exchangers - Hydronic room fan coils units - Determination of the sound power

level

EN ISO 3740:2019, Acoustics - Determination of sound power levels of noise sources - Guidelines for the use

of basic standards (ISO 3740:2019)

EN 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 3741:2010)

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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)

EN ISO 3743-1:2010, Acoustics - Determination of sound power levels and sound energy levels of noise

sources using sound pressure - Engineering methods for small movable sources in reverberant fields – Part 1:

Comparison method for a hard-walled test room (ISO 3743-1:2010)

EN ISO 3743-2:2019, Acoustics - Determination of sound power levels of noise sources using sound pressure

- Engineering methods for small, movable sources in reverberant fields - Part 2: Methods for special

reverberation test rooms (ISO 3743-2:2018)

EN ISO 3744:2010, Acoustics - Determination of sound power levels and sound energy levels of noise sources

using sound pressure - Engineering methods for an essentially free field over a reflecting plane

(ISO 3744:2010)

EN ISO 3745:2012/A1:2017, Acoustics - Determination of sound power levels and sound energy levels of

noise sources using sound pressure - Precision methods for anechoic rooms and hemi-anechoic rooms -

Amendment 1 (ISO 3745:2012/Amd 1:2017)

EN ISO 3746:2010, Acoustics - Determination of sound power levels and sound energy levels of noise sources

using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane

(ISO 3746:2010)

EN ISO 3747:2010, Acoustics - Determination of sound power levels and sound energy levels of noise sources

using sound pressure - Engineering/survey methods for use in situ in a reverberant environment

(ISO 3747:2010)

EN ISO 5136:2009, Acoustics - Determination of sound power radiated into a duct by fans and other air-

moving devices - In-duct method (ISO 5136:2003)

EN ISO 9614-1:2009, Acoustics - Determination of sound power levels of noise sources using sound intensity

- Part 1: Measurement at discrete points (ISO 9614-1:1993)

EN ISO 9614-2:1996, Acoustics - Determination of sound power levels of noise sources using sound intensity

- Part 2: Measurement by scanning (ISO 9614-2:1996)

EN ISO 9614-3:2009, Acoustics - Determination of sound power levels of noise sources using sound intensity

- Part 3: Precision method for measurement by scanning (ISO 9614-3:2002)
3 Terms, definitions and symbols

For the purposes of this document, the terms, definitions and symbols given in prEN 14511-1:2021,

prEN 14825:2020, EN 15218:2013, EN 810:1997, EN ISO 9614-1:2009, EN ISO 9614-2:1996,

EN ISO 9614-3:2009, EN ISO 3740:2019, EN ISO 3741:2010, EN ISO 3743-1:2010, EN ISO 3743-2:2019,

EN ISO 3744:2010, EN ISO 3745:2012/A1:2017, EN ISO 3746:2010 and EN ISO 3747:2010 and the

following apply.

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

— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)
3.1 Terms and definitions
3.1.1
required value, sound power level, defined by Formula (1):
L = 10lg  dB (1)
0
where
P is the sound power;
is the reference sound power = 1 pW

Note 1 to entry: This definition is technically in accordance with ISO 80000-8:2007.

3.1.2
overall A-weighted sound power level indoors or outdoors
Note 1 to entry: Expressed in dB(A).
3.2 Symbols, subscripts and units
3.2.1 General
The symbols, subscripts and units are given in Table 1.
Table 1 — Symbols, subscripts and units
Symbol/Subscript Denomination Unit
L sound power level dB
L A-weighted sound power level dB(A)
c speed of sound in air m/s
T dry bulb temperature °C
f centre frequency band Hz
S area of the duct opening in the room
Ω solid of the radiation path from the test opening —
W sound power —
W reference sound power —
I indoor side of units —
O outdoor side of units —
d in duct —
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oSIST prEN 12102-1:2021
prEN 12102-1:2021 (E)
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