1、BS EN ISO9612:2009ICS 13.140; 17.140.20; 17.140.50NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAcoustics Determinationof occupationalnoise exposure Engineering method(ISO 9612:2009)This British Standard was published under the authority of the Standards Polic
2、y and Strategy Committee on 31 July 2009 BSI 2009ISBN 978 0 580 68697 9Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 9612:2009National forewordThis British Standard is the UK implementation of EN ISO 9612:2009. The UK participation in its preparation was entrusted to Technical
3、Committee EH/1/3, Residential and industrial noise.A list of organizations represented on this committee can be obtained onrequest to its secretary.The UK committee would like users to be aware that it is not a legalrequirement when assessing risks from occupational noise exposure,that exposure be d
4、etermined to engineering grade.The HSE publication L108 Controlling Noise at Work includes guidanceon the assessment of occupational noise exposure. L108 states that em-ployers following the guidance will normally be doing enough to complywith the law.This publication does not purport to include all
5、 the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 9612April 2009ICS 13.140English VersionAcoustics - Determination of occupati
6、onal noise exposure -Engineering method (ISO 9612:2009)Acoustique - Dtermination de lexposition au bruit enmilieu de travail - Mthode dexpertise (ISO 9612:2009)Akustik - Bestimmung der Lrmexposition am Arbeitsplatz -Verfahren der Genauigkeitsklasse 2 (Ingenieurverfahren)(ISO 9612:2009)This European
7、Standard was approved by CEN on 5 March 2009.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
8、such nationalstandards may be obtained on application to the CEN 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 languag
9、e and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembo
10、urg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of e
11、xploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 9612:2009: EBS EN ISO 9612:2009EN ISO 9612:2009 (E) 3 Foreword This document (EN ISO 9612:2009) has been prepared by Technical Committee ISO/TC 43 “Acoustics“ in collaboration with Technical Committee
12、 CEN/TC 211 “Acoustics” the secretariat of which is held by DS. 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 October 2009, and conflicting national standards shall be withdrawn at the latest by
13、 October 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standar
14、ds organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port
15、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 9612:2009 has been approved by CEN as a EN ISO 9612:2009 without any modification. BS EN ISO 9612:2009ISO 9612:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv In
16、troduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols . 4 5 Instrumentation. 5 6 Methodology Chronological steps . 6 7 Work analysis 7 8 Selection of measurement strategies. 8 9 Strategy 1 Task-based measurement. 9 10 Strategy 2 Job-based measurement 12 11 Strategy
17、 3 Full-day measurement. 14 12 Measurements. 15 13 Sources of uncertainty. 17 14 Calculation of measurement uncertainties and presentation of the final results 19 15 Information to be reported. 19 Annex A (informative) Example of a checklist to ensure that significant noise events are detected durin
18、g the work analysis 21 Annex B (informative) Guide to the selection of measurement strategy . 22 Annex C (normative) Evaluation of measurement uncertainties 25 Annex D (informative) An example showing calculation of daily noise exposure level using task-based measurements . 33 Annex E (informative)
19、An example showing calculation of daily noise exposure level using job-based measurements 37 Annex F (informative) Sample calculation of daily noise exposure level using full-day measurements. 40 Bibliography . 43 BS EN ISO 9612:2009ISO 9612:2009(E) iv ISO 2009 All rights reservedForeword ISO (the I
20、nternational 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
21、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 electrotechnica
22、l standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bod
23、ies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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
24、 or all such patent rights. ISO 9612 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. This second edition cancels and replaces the first edition (ISO 9612:1997), which has been technically revised. BS EN ISO 9612:2009ISO 9612:2009(E) ISO 2009 All rights reserved vI
25、ntroduction This International Standard provides a stepwise approach to the determination of occupational noise exposure from noise level measurements. The procedure contains the following major steps: work analysis, selection of measurement strategy, measurements, error handling and uncertainty eva
26、luations, calculations, and presentation of results. This International Standard specifies three different measurement strategies: task-based measurement; job-based measurement; and full-day measurement. This International Standard gives guidance on selecting an appropriate measurement strategy for
27、a particular work situation and purpose of investigation. This International Standard also provides an informative spreadsheet to allow calculation of measurement results and uncertainties. ISO is not responsible for errors that may arise or occur with the use of this spreadsheet. This International
28、 Standard recognizes the use of hand-held sound level meters as well as personal sound exposure meters. The methods specified optimize the effort required for obtaining a given accuracy. BS EN ISO 9612:2009BS EN ISO 9612:2009INTERNATIONAL STANDARD ISO 9612:2009(E) ISO 2009 All rights reserved 1Acous
29、tics Determination of occupational noise exposure Engineering method 1 Scope This International Standard specifies an engineering method for measuring workers exposure to noise in a working environment and calculating the noise exposure level. This International Standard deals with A-weighted levels
30、 but is applicable also to C-weighted levels. Three different strategies for measurement are specified. The method is useful where a determination of noise exposure to engineering grade is required, e.g. for detailed noise exposure studies or epidemiological studies of hearing damage or other advers
31、e effects. The measuring process requires observation and analysis of the noise exposure conditions so that the quality of the measurements can be controlled. This International Standard provides methods for estimating the uncertainty of the results. This International Standard is not intended for a
32、ssessment of masking of oral communication or assessment of infrasound, ultrasound and non-auditory effects of noise. It does not apply to the measurement of the noise exposure of the ear when hearing protectors are worn. Results of the measurements performed in accordance with this International St
33、andard can provide useful information when defining priorities for noise control measures. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest editio
34、n of the referenced document (including any amendments) applies. ISO 1999, Acoustics Determination of occupational noise exposure and estimation of noise-induced hearing impairment ISO/IEC Guide 98-3, Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
35、 IEC 60942:2003, Electroacoustics Sound calibrators IEC 61252, Electroacoustics Specifications for personal sound exposure meters IEC 61672-1:2002, Electroacoustics Sound level meters Part 1: Specifications 3 Terms and definitions For the purposes of this document, the following terms and definition
36、s apply. BS EN ISO 9612:2009ISO 9612:2009(E) 2 ISO 2009 All rights reserved3.1 A-weighted time-averaged sound pressure level Lp,A,TA-weighted equivalent continuous sound pressure level Lp,A,eqT ten times the logarithm to the base 10 of the ratio of the time average of the square of the A-weighted so
37、und pressure, pA, during a stated time interval of duration T (starting at t1and ending at t2), to the square of a reference value, p0, expressed in decibels 212A,A, ,A,eq201()d10 lg dBttpT p TpttTLLp=(1) where the reference value, p0, is 20 Pa NOTE Adapted from ISO/TR 25417:2007 9. 3.2 A-weighted n
38、oise exposure level normalized to an 8 h working day daily noise exposure level LEX,8hoccupational noise level, in decibels, given by the equation: eeEX,8h ,A,eq010 lg dBpTTLLT=+(2) where Lp,A,eqTeis the A-weighted equivalent continuous sound pressure level for Te; Teis the effective duration, in ho
39、urs, of the working day; T0is the reference duration, T0= 8 h NOTE 1 If the effective duration of the working day, Te, is equal to 8 h, then LEX,8hequals Lp,A,eq,8h. NOTE 2 If the average or normalized exposure over a number of days is desired, Equation (3) can be used: EX,8h,0,1EX,8h1110 lg 10 dBxX
40、LxLX=(3) The value of X is chosen according to the purpose of the averaging process. For example, X = 5 leads to a daily noise exposure level normalized to a nominal week of five 8 h working days. NOTE 3 This definition differs from that given in ISO/TR 25417:2007 9. 3.3 nominal day working day over
41、 which it is chosen to determine the noise exposure BS EN ISO 9612:2009ISO 9612:2009(E) ISO 2009 All rights reserved 3NOTE 1 The nominal day is determined from the work analysis and depends on the purpose of the measurements. For example, it may be a typical day representing the work performed over
42、several days or the day with the highest noise exposure. See also 7.3. NOTE 2 The noise exposure level is normally calculated on a daily basis, but there may be circumstances where the use of weekly or longer periods of noise exposure is considered appropriate. 3.4 C-weighted peak sound pressure lev
43、el Lp,Cpeak ten times the logarithm to the base 10 of the ratio of the square of the C-weighted peak sound pressure, pCpeak, to the square of a reference value, p0, expressed in decibels 2Cpeak,Cpeak2010 lg dBppLp= (4) where the reference value, p0, is 20 Pa. 3.5 task occupational noise distinct par
44、t of a workers occupational activity Figure 1 illustrates the hierarchy of jobs and tasks. 3.6 job occupational noise overall occupational activity that is carried out by a worker, consisting of all the tasks performed by the worker during the entire working day or shift NOTE A worker often has a jo
45、b title that describes his or her job, sometimes complemented with an additional description to ensure clear identification, e.g. “welder - process line A”. Figure 1 illustrates the hierarchy of jobs and tasks. Key Job 1 scaffolders Task 1 planning Job 2 welders Task 2 grinding Job 3 painters Task 3
46、 welding Job 4 store keepers Figure 1 An example illustrating the hierarchy of jobs and tasks BS EN ISO 9612:2009ISO 9612:2009(E) 4 ISO 2009 All rights reserved4 Symbols ci sensitivity coefficient related to each input quantity c1sensitivity coefficient associated with job noise level sampling c1a,m
47、sensitivity coefficient associated with noise level sampling of task m c1b,msensitivity coefficient associated with estimation of duration of task m dB h1c2sensitivity coefficient associated with measurement instrumentation c3sensitivity coefficient associated with microphone position i task sample
48、number I the total number of task samples j number of observations of task duration J total number of observations of task duration k coverage factor related to a confidence interval KN denominator as given in C.3.3, Note 2 LEX,8hA-weighted noise exposure level normalized to a nominal 8 h working da
49、y dB EX,8hL A-weighted noise exposure level normalized to a nominal 8 h working day averaged over a number of days dB LEX,8h,mA-weighted noise exposure level of task m contributing to the daily noise exposure level dB A,eqpTmL*,estimate of the true A-weighted equivalent continuous sound pressure level for task m dB Lp,A,T= Lp,A,eqTA-weighted equivalent continuous sound pressure level over a period T dB Lp,A,eqT,mA-weighted equivalent continuous sound pressure
