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BSI 23/30451027 DC:2023 Edition

BSI 23/30451027 DC:2023 Edition

$13.70

BS EN ISO 9612. Acoustics. Determination of occupational noise exposure. Methodology

Published By Publication Date Number of Pages
BSI 2023 56
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PDF Catalog

PDF Pages PDF Title
1 30451027-NC.pdf
3 ISO_DIS 9612 ed.3 – id.81317 Enquiry PDF (en).pdf
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 Symbols
13 5 Instrumentation
5.1 Sound level meters and personal sound exposure meters
14 5.2 Calibrator
5.3 Periodic verification
6 Methodology – Chronological steps
6.1 Step€1: Work analysis
6.2 Step€2: Selection of the measurement strategy
6.3 Step€3: Measurements
6.4 Step€4: Error handling and uncertainties
15 6.5 Step€5: Calculation and presentation of results and uncertainty
7 Work analysis
7.1 Introduction
7.2 Defining homogeneous noise exposure groups (HEG)
16 7.3 Determination of a nominal day
8 Selection of measurement strategies
8.1 General
8.2 Measurement strategies
17 9 Strategy€1 – Task-based measurement
9.1 Dividing the nominal day into tasks
9.2 Duration of tasks
18 9.3 Measurement of  for tasks
9.3.1 General
9.3.2 Number of measurements
9.3.3 Time and duration of measurements
19 9.3.4 Calculation of the A-weighted equivalent continuous sound pressure level
9.4 Calculation of contribution from each task to daily noise exposure level
9.5 Determination of daily noise exposure level
20 10 Strategy€2 – Job based measurement
10.1 General
10.2 Measurement plan – Number, duration and distribution of measurements
21 10.3 Measurements
10.4 Determination of daily noise exposure levels for workers in a homogenous exposure group
22 11 Strategy€3€— Full-day measurement
11.1 General
11.2 Observing work activities and monitoring measurements
11.3 Measurements
23 11.4 Determination of daily noise exposure level
12 Measurements
12.1 Selection of instrumentation
12.2 Field calibration
24 12.3 Instrument worn by the worker
12.4 Integrating-averaging sound level meter
25 13 Sources of uncertainty
13.1 General
26 13.2 Mechanical impacts on microphone
13.3 Wind and airflows
13.4 Relevance of sound contributions
27 14 Calculation of measurement uncertainties and presentation of the final results
15 Information to be reported
29 Annex€A (informative) Example of a checklist to ensure that significant noise events are detected during the work analysis
30 Annex€B (informative) Guide to the selection of measurement strategy
33 Annex€C (normative) Evaluation of measurement uncertainties
42 Annex€D (informative) An example showing calculation of daily noise exposure level using task-based measurements
47 Annex E (informative) An example showing calculation of daily noise exposure level using job‑based measurements
50 Annex€F (informative) Sample calculation of daily noise exposure level using full-day measurements
53 Annex€G (informative) Example calculation of daily noise exposure level for flexible workers
56 Bibliography

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BSI 23/30451027 DC
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