EN ISO 4869-2:1995

Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn (ISO 4869-2:1994)

Describes three methods (the octave-band, HML and SNR methods) for estimating the A-weighted sound pressure levels effective when hearing protectors are worn. The methods are applicable to either the sound pressure level or the equivalent continuous sound pressure level of the noise. Although primarily intended for steady noise exposures, the methods are also applicable to noises containing impulsive components. They are not suitable for use with peak sound pressure level measurements.

Akustik - Gehörschützer - Teil 2: Abschätzung der beim Tragen von Gehörnschützern wirksamen A-bewerteten Schalldruckpegel (ISO 4869-2:1994)

Dieser Teil von ISO 4869 legt drei Verfahren zur Abschätzung des beim Tragen von Gehörschützern wirksamen A-bewerteten Schalldruckpegels fest (das Oktavpegel-, das HML- und das SNR-Verfahren). Die Verfahren sind entweder auf den Schalldruckpegel des Geräusches oder dessen äquivalenten Dauerschalldruck-pegel anwendbar. Obwohl sie primär für den Fall der Einwirkung stationär Geräusche bestimmt sind, sind sie auch auf impulshaltige Geräusche anwendbar. Diese Verfahren sind nicht für Spitzenschalldruckpegelmessungen geeignet.

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 4869-2:1994)

La présente partie de l'ISO 4869 décrit trois méthodes (la méthode par bande d'octave, la méthode HML et la méthode SNR) pour estimer les niveaux de pression acoustique effectifs pondérés A en cas d'utilisation de protecteurs individuels contre le bruit. Ces méthodes s'appliquent soit au niveau de pression acoustique, soit au niveau de pression acoustique continu équivalent du bruit. Bien que prévues essentiellement pour des expositions à un bruit continu, ces méthodes s'appliquent également à des bruits comportant des composantes impulsives. Ces méthodes ne conviennent pas aux mesurages du niveau de pression acoustique de crête. Les valeurs de bande d'octave, H, M, L ou SNR conviennent pour établir des critères d'affaiblissement acoustique de manière à sélectionner ou à comparer les protecteurs individuels contre le bruit et/ou à établir des exigences d'affaiblissement acoustique minimales acceptables.

Akustika – Oprema za varovanje sluha - 2. del: Ocena efektivne A-vrednotene ravni zvočnega tlaka pri nošenju osebne varovalne opreme pred hrupom (ISO 4869-2:1994)

General Information

• Status: Withdrawn
• Publication Date: 13-Jun-1995
• Withdrawal Date: 20-Nov-2018
• ICS: 13.340.20 - Head protective equipment
• Technical Committee: CEN/TC 211 - Acuostics
• Drafting Committee: CEN/TC 211 - Acuostics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 21-Nov-2018
• Directive: 2016/425 - Regulation (EU) 2016/425 of the European Parliament and of the Council of 9 March 2016 on personal protective equipment and repealing Council Directive 89/686/EEC
• Directive: 89/686/EEC - Council Directive 89/686/EEC of 21 December 1989 on the approximation of the laws of the Member States relating to personal protective equipment
• Mandate: M/BC/CEN/90/2 - Order for standardization concerning Personal Protective Equipment (P.P.E.)
• Ref Project: SIST EN ISO 4869-2:1999 - Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn (ISO 4869-2:1994)

Relations

• Replaced By: 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)
• Effective Date: 22-Dec-2008
• Corrected By: EN ISO 4869-2:1995/AC:2007 - Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn (ISO 4869-2:1994/Cor 1:2006)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4869-2:1999
01-november-1999
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]YRþQHJDWODNDSULQRãHQMXRVHEQHYDURYDOQHRSUHPHSUHGKUXSRP,62

Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound
pressure levels when hearing protectors are worn (ISO 4869-2:1994)
Akustik - Gehörschützer - Teil 2: Abschätzung der beim Tragen von Gehörnschützern
wirksamen A-bewerteten Schalldruckpegel (ISO 4869-2:1994)
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 4869-2:1994)
Ta slovenski standard je istoveten z: EN ISO 4869-2:1995
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
SIST EN ISO 4869-2:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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INTERNATIONAL
IS0
STANDARD
4869-2
First edition
1994-09-O 1
Acoustics - Hearing protectors -
Part 2:
Estimation of effective A-weighted sound
pressure levels when hearing protectors are
worn
Acoustique
- Protecteurs individuels con tre le bruit -
Par-tie 2: Estimation des niveaux de pression acoustique pond&& A en
cas d ’utilisa tion de pro tecteurs individuels con tre le bruit
Reference number
IS0 4869-Z: 1994(E)

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IS0 4869=2:1994(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 4869-2 was prepared by Technical Committee
ISOnC 43, Acoustics, Subcomm ttee SC 1, Noise.
IS0 4869 consists of the fol owing parts, under the general title
Acoustics - Hearing pro tee tors:
- Part 7: Subjective method for the measurement of sound attenu-
a tion
- Part 2: Estimation of effective A-weighted sound pressure levels
when hearing protectors are worn
- Part 3: Simplified method for the measurement of insertion loss of
ear-muff type protectors for quality inspection purposes
[Technical Report]
sound attenuation of
- Part 4: Methods for the measurement of
litude-sensitive hearing protectors
amp
Annexes A, B, C, D and E of this part of IS0 4869 are for information only.
0 IS0 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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0 IS0
IS0 4869-2: 1994(E)
Introduction
Ideally, the A-weighted sound pressure level effective when a hearing
protector is worn should be estimated on the basis of both the octave-
band sound attenuation data of the hearing protector (measured in ac-
cordance with IS0 4869-l) and the octave-band sound pressure levels of
the noise. It is recognized, however, that in many situations information
on the octave-band sound pressure levels of the noise might not be
available. Therefore, for many practical purposes, there is a need for sim-
pler methods to determine the effective A-weighted sound pressure levels
which are only based on the A- and C-weighted sound pressure levels of
the noise. This part of IS0 4869 addresses both of these situations by
specifying an octave-band calculation method as well as two alternative
simplified procedures, the HML method and the SNR method.
The octave-band method is a straightforward calculation method involving
the workplace octave-band sound pressure levels and the octave-band
sound attenuation data for the hearing protector which is being assessed.
Although it can be thought of as an “exact” reference method, it has its
own inherent inaccuracies, since it is based upon mean sound attenuation
values and standard deviations and not the specific sound attenuation
values for the individual person in question.
The H
...