1、BSI Standards PublicationBS ISO 16900-14:2015Respiratory protective devices Methods of test and testequipmentPart 14: Measurement of sound levelBS ISO 16900-14:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO16900-14:2015.The UK participation in its prepara
2、tion was entrusted to TechnicalCommittee PH/4, Respiratory protection.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplicat
3、ion. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 82430 2ICS 13.340.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee
4、on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 16900-14:2015 ISO 2015Respiratory protective devices Methods of test and test equipment Part 14: Measurement of sound levelAppareils de protection respiratoire Mthodes dessai et quipment dessai Parti
5、e 14: Mesurage du niveau sonoreINTERNATIONAL STANDARDISO16900-14First edition2015-11-01Reference numberISO 16900-14:2015(E)BS ISO 16900-14:2015ISO 16900-14:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unless otherwise speci
6、fied, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or IS
7、Os member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 16900-14:2015ISO 16900-14:2015(E)Foreword ivIntroduction vi1 Scope . 12 Normative references 13
8、Terms and definitions . 14 Prerequisites 15 General test requirements . 26 Method A Measurement of the noise level 26.1 Principle 26.2 Equipment . 26.3 Procedure 26.4 Test report for method A 37 Method B Measurement of warning sound level 37.1 Principle 37.2 Equipment . 47.3 Procedure 47.4 Test repo
9、rt for method B 4Annex A (normative) Application of uncertainty of measurement 5Bibliography 7 ISO 2015 All rights reserved iiiContents PageBS ISO 16900-14:2015ISO 16900-14:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
10、(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, g
11、overnmental 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 main
12、tenance 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).Atte
13、ntion 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 Introductio
14、n and/or on the ISO list of patent declarations received (see www.iso.org/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 meaning of ISO specific terms and expressions related to conformi
15、ty assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 94, Personal safety Protective clothing and equipment, Subcommit
16、tee SC 15, Respiratory protective devices.ISO 16900 consists of the following parts, under the general title Respiratory protective devices Methods of test and test equipment: Part 1: Determination of inward leakage Part 2: Determination of breathing resistance Part 3: Determination of particle filt
17、er penetration Part 4: Determination of gas filter capacity and migration, desorption and carbon monoxide dynamic testing Part 5: Breathing machine, metabolic simulator, RPD headforms and torso, tools and verification tools Part 6: Mechanical resistance/strength of components and connections Part 7:
18、 Practical performance tests methods Part 8: Measurement of RPD air flow rates of assisted filtering RPD Part 9: Determination of carbon dioxide content of the inhaled air Part 10: Resistance to ignition, flame, radiant heat and heat Part 11: Determination of field of vision Part 12: Determination o
19、f volume-averaged work of breathing and peak respiratory pressures Part 13: RPD using regenerated breathable gas and special application mining escape RPD: Consolidated test for gas concentration, temperature, humidity, work of breathing, breathing resistance, elastance and durationiv ISO 2015 All r
20、ights reservedBS ISO 16900-14:2015ISO 16900-14:2015(E) Part 14: Measurement of sound level ISO 2015 All rights reserved vBS ISO 16900-14:2015ISO 16900-14:2015(E)IntroductionThis part of ISO 16900 is intended as a supplement to the respiratory protective devices (RPD) performance standards. Test meth
21、ods are specified for complete devices or parts of devices. If deviations from the test method given in this part of ISO 16900 are necessary, these deviations will be specified in the performance standards.The following definitions apply in understanding how to implement an ISO International Standar
22、d and other normative ISO deliverables (TS, PAS, IWA): “shall” indicates a requirement; “should” indicates a recommendation; “may” is used to indicate that something is permitted; “can” is used to indicate that something is possible, for example, that an organization or individual is able to do some
23、thing.3.3.1 of the ISO/IEC Directives, Part 2 (sixth edition, 2011) defines a requirement as an “expression in the content of a document conveying criteria to be fulfilled if compliance with the document is to be claimed and from which no deviation is permitted.”3.3.2 of the ISO/IEC Directives, Part
24、 2 (sixth edition, 2011) defines a recommendation as an “expression in the content of a document conveying that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others, or that a certain course of action is preferred but not necessarily require
25、d, or that (in the negative form) a certain possibility or course of action is deprecated but not prohibited.”vi ISO 2015 All rights reservedBS ISO 16900-14:2015INTERNATIONAL STANDARD ISO 16900-14:2015(E)Respiratory protective devices Methods of test and test equipment Part 14: Measurement of sound
26、level1 ScopeThis part of ISO 16900 specifies a laboratory test method for determining the sound level generated by the complete respiratory protective device (RPD) and RPD warning sounds measured on a headform to which the RPD is fitted.2 Normative referencesThe following documents, in whole or in p
27、art, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 16972, Respiratory protective devices Terms,
28、definitions, graphical symbols and units of measurementIEC 61260-1, Octave-band and fractional-octave-band filters Part 1: SpecificationsIEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications3 Terms and definitionsFor the purposes of this document, the terms and definitions given in
29、 ISO 16972 apply.3.1A-weighted equivalent continuous sound pressure level Lp, A,eqT10 times the logarithm to the base 10 of the ratio of the time average of the square of the A-weighted sound pressure, pA, during a stated time interval of duration T (starting at t1and ending at t2) to the square of
30、the reference value, p0, expressed in decibelsNote 1 to entry: Lp, A,eqT= 10lg12221TtdtpAttp()OdB, where the reference value, p0, is 20 Pa.SOURCE: ISO 9612:2009 1, 3.1 modified4 PrerequisitesIn order to implement this part of ISO 16900, at least the following parameters need to be specified in the r
31、elevant device standard:a) the number of RPD specimens;b) any prior conditioning or testing;c) the RPD operating conditions; ISO 2015 All rights reserved 1BS ISO 16900-14:2015ISO 16900-14:2015(E)d) test duration;e) any deviations from the method(s).5 General test requirementsUnless otherwise specifi
32、ed, the values stated in this part of ISO 16900 are expressed as nominal values. Except for temperature limits, values which are not stated as maxima or minima shall be subject to a tolerance of 5 %. Unless otherwise specified, the ambient conditions for testing shall be between 16 C and 32 C and (5
33、0 30) % RH. Any temperature limits specified shall be subject to an accuracy of 1 C.Where the assessment of the pass/fail criterion depends on a measurement, an uncertainty of measurement as specified in Annex A shall be reported.6 Method A Measurement of the noise level6.1 PrincipleThe RPD is opera
34、ted on a RPD headform and torso connected to a breathing machine. Microphones are placed to measure the A-weighted continuous equivalent sound pressure level generated by the device, exclusive of any warning device, at the right and left ears.6.2 Equipmenta) The required RPD headform with soft surfa
35、ce finish shall be used. Additionally, RPD torso can be used where necessary. An omnidirectional microphone that has a profile of no more than 5 mm above the surface of the RPD headform when fitted in the test ear position inside the RPD shall be used, see Figure 1.b) An instrument that meets the IE
36、C 61672-1 Class 2 standard for sound level meters, capable of measuring the integrated A-weighted sound pressure level in decibels, indicated as dBA.c) A suitable associated sound calibrator for the microphone system and sound level meter.d) A breathing machine or metabolic simulator as appropriate.
37、The test environment should not include surfaces that may reflect sound from the specimen.6.3 Procedurea) The sound level meter and microphone system shall be calibrated using the associated sound calibrator.b) The microphone shall be placed so that it faces outwards and lies flat on the external ea
38、r (pinnae) of the RPD headform at the position shown in Figure 1. This position corresponds to the centre of the external ear and level with the tragus. The microphones shall be held in place so that they do not move during the test. To avoid sound reflections caused by the measurement equipment, an
39、y microphone supporting elements, electrical leads, etc. within 30 mm of the measurement point shall occupy an area not exceeding 5 mm2in any plane above the surface of the RPD headform. It shall be ensured that any electrical leads are held in place flat to the surface of the RPD headform.NOTE Putt
40、y or stickytack has been successfully used to stick the microphone to the RPD headform.If part of the microphone is inset into the RPD headform, the sensing element of the microphone shall not be below the surface of the RPD headform and the opening shall be sealed against the side of the microphone
41、.2 ISO 2015 All rights reservedBS ISO 16900-14:2015ISO 16900-14:2015(E)c) The RPD shall be fitted on the RPD headform and torso, making all the necessary adjustments to ensure a good fit with reference to the manufacturers instructions for use. The RPD shall not make contact with the microphone asse
42、mbly.d) The RPD shall be operated as specified by the manufacturer at the manufacturers maximum flow conditions.e) Operate the breathing machine or metabolic simulator at the appropriate workrate for the class of the RPD.f) The Lp, A,eqT(A-weighted equivalent continuous sound pressure level) at both
43、 ear positions shall be measured. Measurements shall be made over the period of time as required by the performance standard during continuous operation of the RPD.g) The background noise level in the test room, measured without the RPD fitted to the RPD headform, but with the breathing machine oper
44、ating (when used), shall be a maximum of 70 dBA.h) The measurements shall be repeated three times, refitting the RPD on the RPD headform and torso in between each measurement.Key1 required RPD headform2 microphone position in flattened pinnea3 sound measurement deviceFigure 1 Typical arrangement of
45、the sound level measurement6.4 Test report for method AThe test report shall include information regarding those parameters specified in Clause 4, together with the background sound pressure level and the maximum measured Lp, A,eqTvalue. The uncertainty of measurement shall be reported.7 Method B Me
46、asurement of warning sound level7.1 PrincipleThe RPD is operated on a RPD headform and torso connected to a breathing machine. Microphones are placed to measure the sound spectrum generated by the RPD warning device at the right and left ears. ISO 2015 All rights reserved 3BS ISO 16900-14:2015ISO 16
47、900-14:2015(E)7.2 Equipmenta) The required RPD headform and torso shall be used. An omnidirectional microphone that has a profile of no more than 5 mm above the surface of the RPD headform when fitted in the test ear position inside the RPD shall be used.b) A sound spectrum analyser specified as con
48、forming to IEC 61260-1.c) A suitable associated sound calibrator for the microphone system and sound spectrum analyser.The test environment should not include surfaces that can reflect sound from the specimen.d) A breathing machine or metabolic simulator as appropriate.7.3 Procedurea) The sound leve
49、l meter and microphone system shall be calibrated using the associated sound calibrator.The microphone shall be placed so that it faces outwards and lies flat on the external ear (pinnae) at the position shown in Figure 1. This position corresponds to the centre of the external ear and level with the tragus. The microphones shall be held in place so that they do not move during the test. To avoid sound reflections caused by the measurement equipment, any microphone suppor
