Hearing protectors - General requirements - Part 3: Earmuffs attached to head protection and/or face protection devices

This European Standard specifies requirements for construction, design, performance, marking and user information for earmuffs attached to head protection and/or face protection devices, hereinafter referred to as ‘mounted earmuffs’.
In particular, it specifies the sound attenuation of mounted earmuffs, measured in accordance with EN ISO 4869-1.
Because one model of earmuffs designed to be attached to head protection and/or face protection devices can be fitted to a number of other models and sizes, this part of the standard sets out a series of physical and acoustic requirements for earmuffs when fitted to the specified model(s) or size(s) of head protection and/or face protection device.
All requirements apply to earmuffs fitted to one of the specified models or sizes of head protection and/or face protection device (the basic combination). An abbreviated set of requirements apply applies to the same model of earmuffs when fitted to the other specified models or sizes of head protection and/or face protection device (the supplementary combinations).
Information shall be given on the range of models of carriers tested with the earmuffs which satisfies this European Standard.
Ergonomic aspects are addressed by taking into account, within the requirements, the interaction between the wearer, the device and, where possible, the working environment in which the device is likely to be used (see Annex ZA and EN 458).

Gehörschützer - Allgemeine Anforderungen - Teil 3: An Kopfschutz und/oder Gesichtsschutzgeräten befestigte Kapselgehörschützer

Dieses Dokument legt Anforderungen hinsichtlich Konstruktion, Gestaltung, Leistung, Kennzeichnung und Benutzerinformationen für an Kopfschutz und/oder Gesichtsschutz befestigte Kapselgehörschützer, im Folgenden bezeichnet als „befestigte Kapselgehörschützer“, fest.
Im Besonderen legt es Anforderungen bezüglich der Schalldämmung der befestigten Kapselgehörschützer fest, gemessen in Übereinstimmung mit EN ISO 4869 1:2018.
Dieses Dokument ist nicht anzuwenden für Kapselgehörschützer außerhalb des in dieser Norm definierten Bereichs von Kopfgrößen.
Weil ein Modell von Kapselgehörschützern zur Befestigung an Kopfschutz und/oder Gesichtsschutz an mehreren anderen Modellen und Größen der Trägervorrichtung befestigt werden kann, legt dieser Teil der Norm eine Reihe von physikalischen und akustischen Anforderungen fest, die zu erfüllen sind, wenn die Kapselgehörschützer an einem/einer oder mehreren bestimmten Modell(en) oder Größe(n) eines Kopfschutzes und/oder Gesichtsschutzes angebracht sind.
Alle Anforderungen sind anzuwenden für Kapselgehörschützer, die an einem der angegebenen Modelle oder Größen des Kopfschutzes und/oder Gesichtsschutzes befestigt werden (die Basiskombination). Ein verkürzter Satz an Anforderungen gilt für dasselbe Kapselgehörschützer-Modell, wenn es an die anderen angegebenen Modelle oder Größen des Kopfschutzes und/oder Gesichtsschutzes befestigt wird (die Zusatzkombinationen).
Ergonomische Aspekte werden innerhalb der Anforderungen durch die Einbeziehung der Wechselwirkung zwischen dem Gehörschutzbenutzer, dem Gehörschutz und, wo möglich, der Arbeitsumgebung, in dem der Gehörschutz wahrscheinlich benutzt wird, berücksichtigt (siehe Anhang ZA und EN 458).

Protecteurs individuels contre le bruit - Exigences générales - Partie 3 : Serre-tête montés sur dispositifs de protection de la tête et/ou du visage

Le présent document spécifie les exigences en matière de construction, de conception, de performances, de marquage et d'informations destinées à l'utilisateur des serre-tête montés sur des dispositifs de protection de la tête et/ou du visage, ici désignés sous l'appellation « serre-tête montés ».
Il impose en particulier une déclaration de l'affaiblissement acoustique des serre-tête montés, mesuré conformément à l'EN ISO 4869-1.
Du fait qu'un même modèle de serre-tête peut être monté sur différents modèles ou tailles de dispositifs de protection de la tête et/ou du visage, la présente partie de la norme définit une série d'exigences physiques et acoustiques en fonction du modèle ou de la taille du dispositif de protection de la tête et/ou du visage sur lequel le serre-tête est monté.
Les exigences s'appliquent en totalité à la combinaison de base, c'est-à-dire aux serre-tête montés sur l'un des modèles ou l'une des tailles spécifiés du dispositif de protection de la tête et/ou du visage. Elles s'appliquent en partie seulement à la combinaison supplémentaire, c'est-à-dire aux serre-tête du même modèle mais montés sur des dispositifs de protection de la tête et/ou du visage de modèle ou de taille autre que ceux qui sont spécifiés.
Il est exigé de mettre à disposition les informations sur la gamme de modèles de supports soumis à essai avec les serre-tête qui satisfont à la présente norme.
Dans les exigences spécifiées, les exigences ergonomiques sont prises en compte, notamment l'interaction entre l'utilisateur, l'équipement et, si possible, l'environnement de travail dans lequel l'équipement est susceptible d'être utilisé (voir l'Annexe ZA et l'EN 458).

Varovala sluha - Splošne zahteve - 3. del: Naušniki, pritrjeni na varovalno opremo za zaščito glave in/ali obraza

General Information

Status
Published
Public Enquiry End Date
29-Sep-2018
Publication Date
23-Mar-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
30-Nov-2020
Due Date
04-Feb-2021
Completion Date
24-Mar-2021

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SLOVENSKI STANDARD
SIST EN 352-3:2021
01-april-2021
Nadomešča:
SIST EN 352-3:2003

Varovala sluha - Splošne zahteve - 3. del: Naušniki, pritrjeni na varovalno opremo

za zaščito glave in/ali obraza

Hearing protectors - General requirements - Part 3: Earmuffs attached to head protection

and/or face protection devices
Gehörschützer - Allgemeine Anforderungen - Teil 3: An Kopfschutz und/oder
Gesichtsschutzgeräten befestigte Kapselgehörschützer

Protecteurs individuels contre le bruit - Exigences générales - Partie 3 : Serre-tête

montés sur dispositifs de protection de la tête et/ou du visage
Ta slovenski standard je istoveten z: EN 352-3:2020
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
SIST EN 352-3:2021 en,fr,de

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

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SIST EN 352-3:2021
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SIST EN 352-3:2021
EN 352-3
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN 352-3:2002
English Version
Hearing protectors - General requirements - Part 3:
Earmuffs attached to head protection and/or face
protection devices

Protecteurs individuels contre le bruit - Exigences Gehörschützer - Allgemeine Anforderungen - Teil 3: An

générales - Partie 3 : Serre-tête montés sur dispositifs Kopfschutz und/oder Gesichtsschutzgeräten befestigte

de protection de la tête et/ou du visage Kapselgehörschützer
This European Standard was approved by CEN on 24 February 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 352-3:2020 E

worldwide for CEN national Members.
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SIST EN 352-3:2021
EN 352-3:2020 (E)
Contents Page

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

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms, definitions, symbols and abbreviations ................................................................................... 6

3.1 Terms and definitions ................................................................................................................................... 6

3.2 Symbols and abbreviations ......................................................................................................................... 9

4 Requirements ................................................................................................................................................... 9

4.1 Sizing .................................................................................................................................................................... 9

4.2 Materials and construction .......................................................................................................................... 9

4.2.1 Materials ............................................................................................................................................................. 9

4.2.2 Construction ................................................................................................................................................... 10

4.3 Performance .................................................................................................................................................. 10

4.3.1 General ............................................................................................................................................................. 10

4.3.2 Sizing and adjustability .............................................................................................................................. 10

4.3.3 Cup rotation ................................................................................................................................................... 10

4.3.4 Headband force ............................................................................................................................................. 10

4.3.5 Cushion pressure .......................................................................................................................................... 11

4.3.6 Resistance to damage when dropped ................................................................................................... 12

4.3.7 Resistance to damage when dropped at low temperature (optional) ...................................... 12

4.3.8 Change in headband force (including optional water immersion with headband

under stress) .................................................................................................................................................. 12

4.3.9 Insertion loss ................................................................................................................................................. 12

4.3.10 Resistance to leakage .................................................................................................................................. 12

4.3.11 Ignitability ...................................................................................................................................................... 12

4.3.12 Minimum sound attenuation ................................................................................................................... 13

5 Marking ............................................................................................................................................................ 13

6 User information .......................................................................................................................................... 13

Annex A (informative) Technical changes between this document and the previous edition

of this European Standard ........................................................................................................................ 17

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

requirements of Regulation (EU) 2016/425 aimed to be covered ............................................. 19

Bibliography ................................................................................................................................................................. 21

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SIST EN 352-3:2021
EN 352-3:2020 (E)
European foreword

This document (EN 352-3:2020) has been prepared by Technical Committee CEN/TC 159 “Hearing

protectors”, 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 May 2021, and conflicting national standards shall be

withdrawn at the latest by November 2023.

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 352-3:2002.

The technical changes between this document and the previous edition of this European Standard are

listed in Annex A.

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, which is an integral part of this

document.

According to the CEN-CENELEC Internal Regulations, the national standards organisations 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.
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SIST EN 352-3:2021
EN 352-3:2020 (E)
Introduction

This document sets requirements for personal hearing protection devices in relation to Regulation (EU)

2016/425 on personal protective equipment.

The particular requirement in relation to the ability of hearing protectors to reduce noise below limit

levels is addressed in the standard by requiring the sound attenuation of the hearing protectors,

measured in accordance with EN ISO 4869-1, to be not less than a specified minimum. Further, by

requiring that the measured sound attenuation be declared, the selection of suitable hearing protectors

for individual circumstances can be undertaken according to established practice.

EN 352-3 is part of a family of standards describing product requirements for hearing protectors:

— EN 352-1, Hearing protectors — General requirements — Part 1: Earmuffs
— EN 352-2, Hearing protectors — General requirements — Part 2: Earplugs

— EN 352-3, Hearing protectors — General requirements — Part 3: Earmuffs attached to head

protection and/or face protection devices

— EN 352-4, Hearing protectors — Safety requirements — Part 4: Level-dependent earmuffs

— EN 352-5, Hearing protectors — Safety requirements — Part 5: Active noise reduction earmuffs

— EN 352-6, Hearing protectors — Safety requirements — Part 6: Earmuffs with safety-related audio

input

— EN 352-7, Hearing protectors — Safety requirements — Part 7: Level-dependent earplugs

— EN 352-8, Hearing protectors — Safety requirements — Part 8: Entertainment audio earmuffs

— EN 352-9, Hearing protectors — Safety requirements — Part 9: Earplugs with safety-related audio

input

— EN 352-10, Hearing protectors — Safety requirements — Part 10: Entertainment audio earplugs

Test methods for these requirements for all types of hearing protectors are described in the following

standards:
— EN 13819-1, Hearing protectors — Testing — Part 1: Physical test methods
— EN 13819-2, Hearing protectors — Testing — Part 2: Acoustic test methods

— EN 13819-3, Hearing protectors — Testing — Part 3: Supplementary acoustic test methods

An associated standard EN 458 covers selection, use, care and maintenance of hearing protection.

The parts of EN 352, other than parts 1, 2 and 3, cover the performance of functions additional to

passive hearing protection. Hearing protectors which incorporate one or more of these functions are

subject to the requirements and tests of each of the relevant parts of EN 352-4 to −10, in addition to

that of parts 1, 2 or 3, as appropriate.

The requirements of this document are concerned primarily with the physical and acoustic

performance of earmuffs attached to head protection and/or face protection devices (mounted

earmuffs).
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SIST EN 352-3:2021
EN 352-3:2020 (E)

The sizing requirements enable the majority of the user population to be fitted satisfactorily by

“medium size range” mounted earmuffs. Individuals with other sizes can be accommodated by “small

size range” or “large size range” mounted earmuffs, which are required to be accompanied by

information regarding the range of sizes which they are designed to fit.

The standard also calls for the values of sound attenuation provided by the mounted earmuffs

(measured in accordance with EN ISO 4869-1) in order to assist users in selecting the most appropriate

model of mounted earmuffs for their needs. Minimum values of sound attenuation are also specified.

A maximum variability in insertion loss, measured objectively after a series of performance tests, is

specified. The objective test method only facilitates the making of comparative measurements, and the

insertion loss values obtained will differ from the measured sound attenuation values. The method to

determine the sound attenuation values which requires the mounted earmuffs to be tested whilst being

worn by human test subjects, is regarded as providing the reference test method for the measurement

of the acoustic performance of hearing protectors.
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SIST EN 352-3:2021
EN 352-3:2020 (E)
1 Scope

This document specifies requirements for construction, design, performance, marking and user

information for earmuffs attached to head protection and/or face protection devices, hereinafter

referred to as ‘mounted earmuffs’.

In particular, it specifies requirements regarding the sound attenuation of mounted earmuffs, measured

in accordance with EN ISO 4869-1:2018.

The document does not apply to earmuffs outside the size range of headsizes as defined in this

standard.

Because one model of earmuffs designed to be attached to head protection and/or face protection

devices can be fitted to a number of other models and sizes of the carrier, this part of the standard sets

out a series of physical and acoustic requirements for earmuffs when fitted to the specified model(s) or

size(s) of head protection and/or face protection device.

All requirements apply to earmuffs fitted to one of the specified models or sizes of head protection

and/or face protection device (the basic combination). An abbreviated set of requirements applies to

the same model of earmuffs when fitted to the other specified models or sizes of head protection and/or

face protection device (the supplementary combinations).

Ergonomic aspects are addressed by taking into account, within the requirements, the interaction

between the user, the device and, where possible, the working environment in which the device is likely

to be used (see Annex ZA and EN 458).
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 13819-1:2020, Hearing protectors — Testing — Part 1: Physical test methods
EN 13819-2:2020, Hearing protectors — Testing — Part 2: Acoustic test methods

EN ISO 4869-2:2018, Acoustics — Hearing protectors — Part 2: Estimation of effective A-weighted sound

pressure levels when hearing protectors are worn (ISO 4869-2:2018)
3 Terms, definitions, symbols and abbreviations
3.1 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:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
passive hearing protection

hearing protection that provides attenuation of external sounds not by means of electronics

Note 1 to entry: All hearing protectors have the characteristics of reducing noise by their design and type of

material used. Devices that have only this function are called passive hearing protection.

[SOURCE: EN 352-1:2020, 3.1.1]
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SIST EN 352-3:2021
EN 352-3:2020 (E)
3.1.2
cup

hollow component which is mounted on the equivalent headband and to which a cushion and a liner are

usually fitted
[SOURCE: EN 352-1:2020, 3.1.2]
3.1.3
cup supporting arm

arm, usually of metal or plastics, attached to the head protection and/or face protection device shell and

designed to enable the earmuffs' cup to fit securely around the ear by exerting force against the cup and

pressure through the cushion

Note 1 to entry: It includes the means of attachment to the head protection and/or face protection device.

3.1.4
cushion

deformable component, usually containing a foam plastic or fluid filling, fitted to the rim of the cup to

improve the comfort and fit of the earmuffs on the head
[SOURCE: EN 352-1:2020, 3.1.3]
3.1.5
liner

acoustically absorptive material contained within the cup which is intended to increase the attenuation

of the earmuffs at certain frequencies
[SOURCE: EN 352-1:2020, 3.1.4]
3.1.6
earmuff

hearing protector consisting of circumaural cups pressed or held against the head around each pinna

[SOURCE: EN 352-1:2020, 3.1.6]
3.1.7
equivalent headband

part of the mounted earmuffs which supports the cups and is designed to enable the earmuffs to fit

securely around the ears by exerting force against the cups and pressure through the cushions

Note 1 to entry: It comprises the head protection and/or face protection device (carrier) and the cup

supporting arms and is intended to be functionally equivalent to the headband of headband earmuffs.

3.1.8
carrier

head protection and/or face protection device, primarily intended to protect the upper part of the

user's head and/or face

Note 1 to entry: Examples of suitable PPE carriers are industrial safety helmets, rigid head tops of powered and

supplied air respirator systems, climbing and rescue helmets, face shields, visors.

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SIST EN 352-3:2021
EN 352-3:2020 (E)
3.1.9
insertion loss

mean algebraic difference, in decibels, between the one-third-octave-band sound pressure level

measured by the microphone of the acoustic test fixture in a specified sound field under specified

conditions with the hearing protector absent and the sound pressure level with the hearing protector

present, with other conditions identical

[SOURCE: EN ISO 4869-3:2007, 3.5, modified — The words “mean”, “in a specified sound field under

specified conditions ” and “with other conditions identical” have been added.]
3.1.10
sound attenuation

for a given test signal, the mean difference in decibels between the threshold of hearing with and

without the hearing protector in place

Note 1 to entry: Measured in accordance with EN ISO 4869-1:2018 for a panel of test subjects.

[SOURCE: EN ISO 4869-1:2018, 3.8, modified — The words “for a given test signal” have been moved to

beginning of definition, the words “mean”, “in decibels” have been added, the words “for a test subject”

have been deleted and Note 1 to entry has been added.]
3.1.11
parking position

position of the earmuffs in which the cups are located above the level of the lower edge of the carrier

shell
Note 1 to entry: See also 3.1.12.
3.1.12
stand-by position

position of the earmuffs in which the cups are located below the level of the lower edge of the carrier

shell and in which the cushions are held away from the side of the head or pinna
Note 1 to entry: See also 3.1.11.
3.1.13
basic combination

mounted earmuffs which include the first or only model or size of carrier to which a given model of

earmuffs is fitted, and which will undergo all the tests in the standard
Note 1 to entry: See also 3.1.14.
3.1.14
supplementary combination

mounted earmuffs which include a model or size of carrier, other than the carrier of the basic

combination, to which is fitted the same model of mounted earmuffs as for the basic combination, and

which will undergo an abbreviated set of tests
Note 1 to entry: See also 3.1.13.

Note 2 to entry: The first tested combination of a model of earmuffs and a carrier is the basic combination. The

next combination of a new carrier and the same model of earmuffs is tested as a supplementary combination,

regardless when the basic combination was tested and regardless of the difference of model and size of the

carrier. This applies even if the carrier of the basic combination is not manufactured anymore.

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SIST EN 352-3:2021
EN 352-3:2020 (E)
3.1.15
hygiene cover

temporary, disposable covers fitted over the cushions and intended to protect them from the effects of

dirt, perspiration, cosmetics, etc.
[SOURCE: EN 352-1:2020, 3.1.10]
3.2 Symbols and abbreviations

For the purposes of this document, the following symbols and abbreviations apply.

H High-frequency attenuation value
M Medium-frequency attenuation value
L Low-frequency attenuation value

APV Assumed Protection Value for frequency f and a protection performance of 98 %

f98
SNR Single Number Rating
PPE Personal Protective Equipment
4 Requirements
4.1 Sizing
Mounted earmuffs shall be classified into three size ranges:
— ‘medium size range’ if their adjustability complies with 4.3.2.2;
— ‘small size range’ if their adjustability complies with 4.3.2.3;
— ‘large size range’ if their adjustability complies with 4.3.2.4.

'Small size range’ and ‘large size range' mounted earmuffs shall be accompanied by the information

specified in Clause 6 m).
NOTE A model of mounted earmuffs can fall into one or more size ranges.
4.2 Materials and construction
4.2.1 Materials

4.2.1.1 Those parts of the mounted earmuffs that come into contact with the skin shall be non-

staining, soft and pliable.

4.2.1.2 Those parts of the mounted earmuffs that come into contact with the skin shall not be likely

to cause skin irritation, allergic reaction or have any other adverse effect on health.

NOTE A written statement confirming this requirement can be provided to the test house by the

manufacturer.

4.2.1.3 All materials shall be visibly unimpaired after cleaning and disinfection by the methods

specified by the manufacturer.
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SIST EN 352-3:2021
EN 352-3:2020 (E)
4.2.2 Construction

4.2.2.1 All parts of the mounted earmuffs and cup supporting arms shall be finished smooth and be

free from sharp edges that could cause excessive irritation or injuries.

4.2.2.2 Mounted earmuffs whose cushions and/or liners are intended by the manufacturer to be

replaced by the user shall not require the use of tools for this purpose.
4.3 Performance
4.3.1 General
The requirements specified in 4.3.2 to 4.3.12 shall be satisfied.

Mounted earmuffs shall be conditioned and tested in accordance with EN 13819-1:2020, 4.1.1, 4.1.2 and

4.1.3.
4.3.2 Sizing and adjustability
4.3.2.1 General

Sizing and adjustability shall be tested in accordance with EN 13819-1:2020, 4.2 and the following

requirements satisfied, as appropriate.

In the case of mounted earmuffs incorporating a means to adjust the headband force, these

requirements shall be satisfied at both the maximum and the minimum force setting.

4.3.2.2 'Medium size range' mounted earmuffs

For each of the combinations of test dimensions shown by the letter M in EN 13819-1:2020, Table 3, the

range of adjustment of the cups/equivalent headband and of the width between the cushions shall

enable the mounted earmuffs to be fitted to the headform.
4.3.2.3 'Small size range' mounted earmuffs

For each of the combinations of test dimensions shown by the letter S in EN 13819-1:2020, Table 3, the

range of adjustment of the cups/equivalent headband and of the width between the cushions shall

enable the mounted earmuffs to be fitted to the headform.
4.3.2.4 'Large size range' mounted earmuffs

For each of the combinations of test dimensions shown by the letter L in EN 13819-1:2020, Table 3, the

range of adjustment of the cups/equivalent headband and of the width between the cushions shall

enable the mounted earmuffs to be fitted to the headform.
4.3.3 Cup rotation

When tested in accordance with EN 13819-1:2020, 4.3, the contact between the cushions and the plates

of the fixture shall be continuous insofar as it provides an unbroken barrier between the inside and

outside perimeter of the cushions.
4.3.4 Headband force

When tested in accordance with EN 13819-1:2020, 4.4, the headband force of each specimen shall not

be greater than 14 N. In the case of mounted earmuffs incorporating means to adjust this force, it shall

be possible to adjust the force to 14 N or less.
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SIST EN 352-3:2021
EN 352-3:2020 (E)

For each supplementary combination set, if the conditions a) and b) or a) and c) are not met, the

supplementary combination shall be additionally tested for sound attenuation in accordance with

EN 13819-2:2020, 4.2.

a) The mean value of headband force of the specimens of the supplementary combination set, as

reported in EN 13819-1:2020, 4.4.4, shall be not less than 8 N.

b) When the mean value of headband force of the specimens of the basic combination set, as reported

in EN 13819-1:2020, 4.4.4, is 11 N or more, the mean value of headband force of the specimens of

the supplementary combination set as reported according to EN 13819-1:2020, 4.4.4, shall be not

less than 80 % of that of the specimens of the basic combination set.

c) When the mean value of headband force of the specimens of the basic combination set, as reported

in EN 13819-1:2020, 4.4.4, is less than 11 N, the mean value of the headband force of the

supplementary combination set shall be not less than the value ‘S ’ in Formula (1).

min
R⋅ BASIC
(1)
S =-BASIC
min
100
where

BASIC is the mean value of headband force of the specimens of the basic combination

set in Newton;
R is the reduction in % (obtained from Figure 1).
Key
Y R (%)
X BASIC (N)

Figure 1 — Maximum permitted percentage reduction (R) of the mean value of the headband

force of the specimens of the supplementary combination set
4.3.5 Cushion pressure

When tested in accordance with EN 13819-1:2020, 4.5, the cushion pressure of each specimen shall be

not greater than 4 500 Pa. For mounted earmuffs incorporating means to adjust the headband force,

this requirement shall apply to the maximum force setting or 14 N, whichever is the lower.

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SIST EN 352-3:2021
EN 352-3:2020 (E)
4.3.6 Resistance to damage when dropped

Unless 4.3.7 is to be satisfied, the carrier shell, the cups (except for replaceable cushions) and the cup

supporting arms shall remain intact and fully functional as a passive hearing protection when tested in

accordance with EN 13819-1:2020, 4.6. Neither shall any part of the mounted earmuffs become

detached, such that correct reassembly requires the use of either a tool or a replacement part.

4.3.7 Resistance to damage when dropped at low temperature (optional)

When tested in accordance with EN 13819-1:2020, 4.7, the carrier shell, the cups (except for

replaceable cushions) and the cup supporting arms shall remain intact and fully functional as a passive

hearing protection. Neither shall any part of the mounted earmuffs become detached, such that correct

re-assembly requires the use of either a tool or a replacement part. If the requirements of this subclause

are met, the information shall be supplied to the user with the mounted earmuffs according to

Clause 6 f).

4.3.8 Change in headband force (including optional water immersion with headband under

stress)

The headband force of each specimen shall not change by more than ± 15 % from that reported at 4.3.4

after the mounted earmuffs have been subjected to the appropriate conditioning and tests specified in

EN 13819-1:2020, 4.1.3.7 a) to i). The comparison between the results before and after conditioning

shall be performed for the headband force of each specimen separately. If the headband force according

to 4.3.4 was measured at more than one size adjustment, the ± 15 % limit shall apply only to the size

adjustment which gave the highest initial force. Additionally, and in all cases, the final headband force of

each specimen shall not exceed 14 N. If the test according to EN 13819-1:2020, 4.11 (headband under

stress), has been done and the requirements of 4.3.8 of this document are met, the information

according to Clause 6 e) shall be supplied to the user with the mounted earmuffs.

4.3.9 Insertion loss

The standard deviations reported in accordance with EN 13819-2:2020, 4.1, shall not be greater than

4,0 dB in four or more adjacent one-third-octave-bands, and not greate
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