EN ISO 4869-2:2018

SLOVENSKI STANDARD
01-januar-2019
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SIST EN ISO 4869-2:1999
SIST EN ISO 4869-2:1999/AC:2007
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Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound
pressure levels when hearing protectors are worn (ISO 4869-2:2018)
Akustik - Gehörschützer - Teil 2: Abschätzung der beim Tragen von Gehörschützern
wirksamen A-bewerteten Schalldruckpegel (ISO 4869-2:2018)
Acoustique - Protecteurs individuels contre le bruit - Partie 2: Estimation des niveaux de
pression acoustique pondérés A en cas d'utilisation de protecteurs individuels contre le
bruit (ISO 4869-2:2018)
Ta slovenski standard je istoveten z: EN ISO 4869-2:2018
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4869-2
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2018
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN ISO 4869-2:1995
English Version
Acoustics - Hearing protectors - Part 2: Estimation of
effective A-weighted sound pressure levels when hearing
protectors are worn (ISO 4869-2:2018)
Acoustique - Protecteurs individuels contre le bruit - Akustik - Gehörschützer - Teil 2: Abschätzung der beim
Partie 2: Estimation des niveaux de pression Tragen von Gehörschützern wirksamen A-bewerteten
acoustique pondérés A en cas d'utilisation de Schalldruckpegel (ISO 4869-2:2018)
protecteurs individuels contre le bruit (ISO 4869-
2:2018)
This European Standard was approved by CEN on 23 April 2018.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4869-2:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4869-2:2018) 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 May 2019, and conflicting national standards shall be
withdrawn at the latest by May 2019.
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 4869-2:1995.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4869-2:2018 has been approved by CEN as EN ISO 4869-2:2018 without any
modification.
INTERNATIONAL ISO
STANDARD 4869-2
Second edition
2018-10
Acoustics — Hearing protectors —
Part 2:
Estimation of effective A-weighted
sound pressure levels when hearing
protectors are worn
Acoustique — Protecteurs individuels contre le bruit —
Partie 2: Estimation des niveaux de pression acoustique pondérés A en
cas d'utilisation de protecteurs individuels contre le bruit
Reference number
ISO 4869-2:2018(E)
©
ISO 2018
ISO 4869-2:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 4869-2:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Measurement of sound attenuation of hearing protectors . 2
5 Calculation of the assumed protection value, APV , of a hearing protector for a
fx
selected protection performance . 2
6 Octave-band method. 3
7 HML method . 4
7.1 General . 4
7.2 Calculation of H, M and L values . 4
7.3 Application of HML method for estimation of the effective A-weighted sound
pressure level . 6
8 SNR method . 6
8.1 General . 6
8.2 Calculation of SNR values . 6
8.3 Application of SNR method for estimation of the effective A-weighted sound
pressure level . 7
Annex A (informative) Example of the calculation of the assumed protection values, APV .9
fx
Annex B (informative) Example of the calculation of L′ according to the octave-band method .10
p,Ax
Annex C (informative) Example of the calculation and use of H, M and L values .11
Annex D (informative) Example of the calculation and use of SNR values .14
Annex E (informative) Uncertainty of attenuation values and ratings .16
Bibliography .18
ISO 4869-2:2018(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.o rg/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 on 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 the following
URL: www. iso. org/iso/foreword. html.
This document was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.
This second edition cancels and replaces the first edition (ISO 4869-2:1994) which has been technically
revised. It also incorporates the corrected version ISO 4869-2:1994/Cor.1:2006.
The main technical changes are:
In the prior edition of the standard the H, M, L, and SNR values were computed from the group average
data by frequency. In this edition, the values are computed subject by subject and then combined
to provide both a mean value and a standard deviation value so that population distribution can be
estimated. The sound attenuation values for the frequency 63 Hz have been excluded from the H, M, L
and SNR calculation methods since this test frequency is optional in ISO 4869-1. Prior to rounding to
the nearest integer, values derived using this edition deviate from those derived using the previous
edition by less than 1 dB.
A list of all parts in the ISO 4869 series can be found on the ISO website.
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 2018 – All rights reserved

ISO 4869-2:2018(E)
Introduction
This document estimates an “effective” level, i.e. the A-weighted sound pressure level at the head centre
with the listener absent, minus the attenuation of the hearing protection devices. Effective values are
estimated since those are required to assess noise hazard with respect to permissible noise exposure
limits. An effective level differs from that in the
...