Hearing protectors - Safety requirements and testing - Part 7: Level-dependent ear-plugs

This European Standard is concerned with level-dependent ear-plugs. It specifies additional constructional, design and performance requirements, methods of test, marking requirements and user information relating to the incorporation of the level-dependency facility. The requirements of this standard are intended to take account of the ergonomic interaction between the wearer, the device and where possible the working environment in which the device is likely to be used (see Annex ZA, of this standard and EN 458).

Gehörschützer - Sicherheitstechnische Anforderungen und Prüfungen - Teil 7: Pegelabhängig dämmende Gehörschutzstöpsel

Diese Europäische Norm behandelt pegelabhängig dämmende Gehörschutzstöpsel. Er legt für die Baugruppe der pegelabhängigen Schalldämmung geltende Anforderungen hinsichtlich Konstruktion, Gestaltung, Eigenschaften, Kennzeichnung und Benutzerinformationen fest und nennt entsprechende Prüfverfahren. Die Anforderungen dieser Norm haben das Ziel, die ergonomische Wechselwirkung zwischen dem Benutzer, dem Gerät und wo möglich der Arbeitsumgebung, in der das Gerät  voraussichtlich benutzt wird, zu berücksichtigen (siehe Anhang ZA dieser Norm und EN 458).

Protecteurs individuels contre le bruit - Exigences de sécurité et essais - Partie 7: Bouchons d'oreilles a atténuation dépendante du niveau

La présente Norme européenne traite des bouchons d'oreilles a systeme électronique de restitution du son dépendant du niveau. Elle spécifie les exigences supplémentaires en matiere de construction, de conception, de performance, les méthodes d'essai et les exigences de marquage ainsi que les informations destinées a l'utilisateur et relatives a la mise en place du dispositif d'atténuation dépendante du niveau. Elle ne concerne pas les performances des bouchons d'oreilles dans un environnement de bruit impulsionnel.
Les exigences de la présente norme prennent en compte l'interaction ergonomique entre l'utilisateur, le dispositif et, lorsque cela est possible, l'environnement de travail auquel le dispositif est destiné (voir Annexe ZA de la présente norme et l'EN 458).

Varovala sluha - Varnostne zahteve in preskušanje - 7. del: Čepi, prilagodljivi ravni hrupa

General Information

Status
Withdrawn
Publication Date
31-Mar-2003
Withdrawal Date
16-Mar-2021
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
17-Mar-2021
Due Date
09-Apr-2021
Completion Date
17-Mar-2021

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Hearing protectors - Safety requirements and testing - Part 7: Level-dependent ear-plugsKUXSDProtecteurs individuels contre le bruit - Exigences de sécurité et essais - Partie 7: Bouchons d'oreilles a atténuation dépendante du niveauGehörschützer - Sicherheitstechnische Anforderungen und Prüfungen - Teil 7: Pegelabhängig dämmende Gehörschutzstöpsel13.340.20Varovalna oprema za glavoHead protective equipmentICS:SIST EN 352-7:2003enTa slovenski standard je istoveten z:EN 352-7:200201-april-2003SIST EN 352-7:2003SLOVENSKI
STANDARD







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 352-7December 2002ICS 13.340.20English versionHearing protectors - Safety requirements and testing - Part 7:Level-dependent ear-plugsProtecteurs individuels contre le bruit - Exigences desécurité et essais - Partie 7: Bouchons d'oreilles àatténuation dépendante du niveauGehörschützer - Sicherheitstechnische Anforderungen undPrüfungen - Teil 7: Pegelabhängig dämmendeGehörschutzstöpselThis European Standard was approved by CEN on 16 October 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 352-7:2002 E



EN 352-7:2002 (E)2ContentspageForeword.3Introduction.41Scope.42Normative references.43Terms and definitions.54Requirements.55Testing.66Information supplied by the manufacturer.67Marking.7Annex A
(informative)
Uncertainty of measurement and interpretation of test results.8Annex B (informative)
Determination of criterion level for level-dependent ear-plugs.10Annex ZA
(informative)
Clauses of this European standard addressing essential requirementsor other provisions of EU Directive.12Bibliography.13



EN 352-7:2002 (E)3ForewordThis document (EN 352-7:2002) has been prepared by Technical Committee CEN/TC 159, "Hearing protectors",the secretariat of which is held by SIS.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2003, and conflicting national standards shall be withdrawn at the latest byJune 2003.This document has been prepared under a mandate given to CEN by the European Commission and the EuropeanFree Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directives, see informative Annex ZA, which is an integral part of this standard.In this standard the annexes A and B are informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.



EN 352-7:2002 (E)4IntroductionThis standard for ”Hearing Protectors – Safety requirements and testing – Part 7: Level-dependent ear-plugs”,specifies procedures for the testing of personal hearing protection devices in relation to Directive 89/686/EEC -Personal Protective Equipment.EN 352-1 deals with requirements for ear-muffs, EN 352-2 with ear-plugs, EN 352-3 with ear-muffs attached toindustrial safety helmets. EN 13819-1 and EN 13819-2 deal with testing plans common to all types of hearingprotectors covered by this series of ENs.Additional safety requirements and the associated test procedures for level-dependent ear-muffs are contained inEN 352-4, for ear-muffs with active noise reduction in EN 352-5 and for ear-muffs with electrical audio input facilityin EN 352-6.
An associated standard EN 458, covers selection, use, care and maintenance of hearing protection.The particular requirement for hearing protectors in relation to their ability to reduce noise to below daily limit levels setby Directive 86/188/EEC - "on the protection of workers from the risks related to exposure to noise at work" isaddressed in the standard by means of a requirement to report in which noise environments the hearing protector maybe used without exceeding the relevant action level set by that Directive.The test method for hearing protector attenuation described in EN 24869-1 and applied in Parts 1, 2 and 3 is notsufficient for level-dependent ear-plugs. Additional methods of measurement, for the purposes of determining thesound delivered to the wearer's ear from the sound restoration circuit, are under consideration.
Until such time as thiswork is completed, the test method described in Annex B of this standard is recommended for level-dependent ear-plugs, in addition to the EN 24869-1 test.Level-dependent ear-plugs are designed to provide restoration of external sounds, while providing attenuation ofsounds at high levels. They may be selected for use in intermittent or impulsive noise environments and where externalwarning sounds are required to be heard. This standard is concerned with those ear-plugs having an electronic soundrestoration circuit.This part of the standard is a specification intended for type approval purposes, for which 4 sets of specimen ear-plugsare tested, (further samples may be required for testing under EN 352-2).The requirements and tests of the standard are concerned primarily with the level-dependent performance of theear-plugs.1 ScopeThis European Standard is concerned with ear-plugs fitted with an electronic level-dependent sound restorationfunction. It specifies additional constructional, design and performance requirements, methods of test, markingrequirements and user information relating to the incorporation of the level-dependency facility. The performance of theear-plug in impulsive noise is not addressed.The requirements of this standard are intended to take account of the ergonomic interaction between the wearer,the device and, where possible, the working environment in which the device is likely to be used (see Annex ZA ofthis standard and EN 458)2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 352-2:2002, Hearing protectors - General requirements - Part 2: Ear-plugsEN 13819-1, Hearing protectors - Testing - Part 1: Physical test methods



EN 352-7:2002 (E)53 Terms and definitionsFor the purposes of this European Standard the terms and definitions given in EN 352-2:2002 and the followingterms and definitions apply:3.1 criterion level (H)A-weighted sound pressure level of the H noise for which the A-weighted diffuse-field related sound pressure levelwhen a level-dependent ear-plug is worn first exceeds 85 dB(A), calculated as the mean plus one standard deviationperformance for the samples tested3.2 criterion level (M)A-weighted sound pressure level of the M noise for which the A-weighted diffuse-field related
sound pressure levelwhen a level-dependent ear-plug is worn first exceeds 85 dB(A), calculated as the mean plus one standard deviationperformance for the samples tested3.3 criterion level (L)A-weighted sound pressure level of the L noise for which the A-weighted diffuse-field related
sound pressure levelwhen a level-dependent ear-plug is worn first exceeds 85 dB(A), calculated as the mean plus one standard deviationperformance for the samples tested3.4 level-dependent ear-plugear-plug fitted with an electronic level-dependent sound restoration circuit3.5 sound restoration circuitelectroacoustic device intended to reproduce lower level external sounds in the ear canal, while usually providingattenuation of higher level sounds by means of a level-dependent gain function4 Requirements4.1 GeneralLevel-dependent ear-plugs shall meet the requirements of EN 352-2. Additional requirements are listed below.4.2 Materials and constructionThe electronic circuit of the level-dependent ear-plug shall meet the electrical safety and EMC requirementsappropriate to this class of equipment.4.3 Performance4.3.1 GeneralLevel-dependent ear-plugs shall meet all the performance requirements of EN 352-2, including the minimumattenuation requirement in their passive mode. Additionally, the requirements specified below in 4.3.2 shall be satisfied.Specimens of ear-plugs shall be conditioned and tested as specified in 5.1.1 and 5.1.2.
The scheme of testing shall beas specified in 5.1.3.



EN 352-7:2002 (E)64.3.2 Criterion levelsThe criterion levels for the three noises H, M and L determined in accordance with 5.2 shall be reported in wearerinformation (6.1).5 Testing5.1 Specimens, conditioning and scheme of testingThis scheme of testing is additional to that described in EN 13819-1. It shall be carried out on additional samples.5.1.1 SpecimensFour sets of ear-plugs shall be submitted for testing. The individual ear-plugs shall be numbered 1 to 8. Fresh batteriesshall be fitted for the test.5.1.2 Conditioning and testing atmosphereAll specimens
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