AS/NZS 1270:1999
Acoustics - Hearing protectors
Specifies requirements for the design, material and performance of hearing protectors, including a laboratory-based real-ear subjective method for determining the sound attenuation.
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AS/NZS 1270:1999 ACOUSTICS-HEARING PROTECTORS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.4.1 Acoustic helmet
1.4.2 Diffuse sound field
1.4.3 Disposable earplug
1.4.4 Ear canal cap
1.4.5 Earmuff
1.4.6 Earplug
1.4.7 Hearing protector
1.4.8 Occluded-ear threshold of hearing
1.4.9 Open-ear threshold of hearing
1.4.10 Pink noise
1.4.11 Real-ear attenuation
1.4.12 Reference point
1.4.13 Reverberation time
1.4.14 Suspension system
1.4.15 Test signal
1.4.16 Threshold of hearing
1.4.17 User formable earplug
SECTION 2 GENERAL REQUIREMENTS
2.1 DESIGN AND CONSTRUCTION
2.1.1 General
2.1.2 Earmuffs
2.2 MATERIALS
2.3 WEARER INFORMATION
2.3.1 Information in or on the packaging
2.3.2 Information on the packaging
2.3.3 Information with each packaged pair of earplugs
2.4 MARKING
SECTION 3 PERFORMANCE
3.1 PHYSICAL REQUIREMENTS
3.2 TEST PROCEDURES
3.2.1 General
3.2.2 Examination
3.2.3 Preparation
3.2.4 Clamping force test
3.2.5 Dry heat test
3.2.6 Low temperature drop test
3.2.7 Cleaning
3.2.8 Second measurement of clamping force
3.2.9 Attenuation
SECTION 4 METHOD FOR MEASUREMENT OF THE REAL-EAR ATTENUATION OF HEARING PROTECTORS
4.1 SCOPE OF SECTION
4.2 PHYSICAL REQUIREMENTS OF THE TEST FACILITY
4.2.1 Test signals
4.2.2 Test site
4.2.3 Test equipment
4.3 TEST SUBJECTS
4.3.1 Conditions for subject acceptance/dismissal
4.3.2 Previous experience with hearing protectors
4.3.3 Anatomical features
4.3.4 Otoscopic inspection
4.3.5 Age
4.3.6 Sex
4.3.7 Maximum hearing levels
4.3.8 Minimum hearing levels
4.3.9 Threshold variability
4.3.10 Spectacles and jewellery
4.3.11 Literacy
4.3.12 Number of subjects
4.3.13 Maximum number of tests per subject
4.3.14 Exceptions
4.4 PRODUCT SAMPLES
4.4.1 General
4.4.2 Custom-moulded earplugs
4.4.3 Product instructions
4.4.4 Variable position headbands
4.5 TEST PROCEDURE
4.5.1 Preliminary set-up
4.5.2 Test method
4.5.3 Re-determination of thresholds
4.6 COMPUTATION OF REAL-EAR ATTENUATION
4.7 COMPUTATION OF CLASS OF HEARING PROTECTOR
4.8 TEST REPORT
APPENDIX A - CALCULATION OF SLC80 AND CLASS OF HEARING PROTECTOR
A1 GENERAL
A2 CALCULATION OF SLC80
A3 EXAMPLE OF SLC80 CALCULATION
A3.1 Step 1
A3.2 Step 2
A4 DETERMINATION OF CLASS
A5 BIBLIOGRAPHY
APPENDIX B - QUALITY CONTROL TESTS
B1 SCOPE
B2 QUALITY CONTROL TESTS
B3 COMPARISON WITH THE ORIGINAL CLAMPING FORCE TEST VALUE
APPENDIX C - COUNTERBALANCING
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Related Information
Approved Code Of Practice For Safety And Health In Forest Operations (2012)
Ministry: WorkSafe New Zealand
Section: 3.6.2
Citation context:Hearing protectors shall comply with either: AS/NZS 1270:1999 Hearing protectors, or ...
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Ministry: New Zealand Timber Preservation Council Inc
Section: 6.9.1.7
Citation context:Hearing protection devices should be worn whenever noise levels are likely to impair an employee’s hearing. They must be of a type approved for the degree of protection required. (See AS/NZS 1270:1999 Hearing protectors).
Selection And Use Of Hearing Protectors
Ministry: WorkSafe New Zealand
Section: ACCEPTED STANDARDS
Citation context:Listed as an accepted Standard.
Selection And Use Of Hearing Protectors
Ministry: WorkSafe New Zealand
Section: HEARING PROTECTOR RATINGS
Citation context:Until the publication of AS/NZS1270 in 1999, hearing protectors were “graded” based upon the results of sound attenuation1 testing according to standards such as...
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AS/NZS 1270:1999 ACOUSTICS-HEARING PROTECTORS
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
1.4.1 Acoustic helmet
1.4.2 Diffuse sound field
1.4.3 Disposable earplug
1.4.4 Ear canal cap
1.4.5 Earmuff
1.4.6 Earplug
1.4.7 Hearing protector
1.4.8 Occluded-ear threshold of hearing
1.4.9 Open-ear threshold of hearing
1.4.10 Pink noise
1.4.11 Real-ear attenuation
1.4.12 Reference point
1.4.13 Reverberation time
1.4.14 Suspension system
1.4.15 Test signal
1.4.16 Threshold of hearing
1.4.17 User formable earplug
SECTION 2 GENERAL REQUIREMENTS
2.1 DESIGN AND CONSTRUCTION
2.1.1 General
2.1.2 Earmuffs
2.2 MATERIALS
2.3 WEARER INFORMATION
2.3.1 Information in or on the packaging
2.3.2 Information on the packaging
2.3.3 Information with each packaged pair of earplugs
2.4 MARKING
SECTION 3 PERFORMANCE
3.1 PHYSICAL REQUIREMENTS
3.2 TEST PROCEDURES
3.2.1 General
3.2.2 Examination
3.2.3 Preparation
3.2.4 Clamping force test
3.2.5 Dry heat test
3.2.6 Low temperature drop test
3.2.7 Cleaning
3.2.8 Second measurement of clamping force
3.2.9 Attenuation
SECTION 4 METHOD FOR MEASUREMENT OF THE REAL-EAR ATTENUATION OF HEARING PROTECTORS
4.1 SCOPE OF SECTION
4.2 PHYSICAL REQUIREMENTS OF THE TEST FACILITY
4.2.1 Test signals
4.2.2 Test site
4.2.3 Test equipment
4.3 TEST SUBJECTS
4.3.1 Conditions for subject acceptance/dismissal
4.3.2 Previous experience with hearing protectors
4.3.3 Anatomical features
4.3.4 Otoscopic inspection
4.3.5 Age
4.3.6 Sex
4.3.7 Maximum hearing levels
4.3.8 Minimum hearing levels
4.3.9 Threshold variability
4.3.10 Spectacles and jewellery
4.3.11 Literacy
4.3.12 Number of subjects
4.3.13 Maximum number of tests per subject
4.3.14 Exceptions
4.4 PRODUCT SAMPLES
4.4.1 General
4.4.2 Custom-moulded earplugs
4.4.3 Product instructions
4.4.4 Variable position headbands
4.5 TEST PROCEDURE
4.5.1 Preliminary set-up
4.5.2 Test method
4.5.3 Re-determination of thresholds
4.6 COMPUTATION OF REAL-EAR ATTENUATION
4.7 COMPUTATION OF CLASS OF HEARING PROTECTOR
4.8 TEST REPORT
APPENDIX A - CALCULATION OF SLC80 AND CLASS OF HEARING PROTECTOR
A1 GENERAL
A2 CALCULATION OF SLC80
A3 EXAMPLE OF SLC80 CALCULATION
A3.1 Step 1
A3.2 Step 2
A4 DETERMINATION OF CLASS
A5 BIBLIOGRAPHY
APPENDIX B - QUALITY CONTROL TESTS
B1 SCOPE
B2 QUALITY CONTROL TESTS
B3 COMPARISON WITH THE ORIGINAL CLAMPING FORCE TEST VALUE
APPENDIX C - COUNTERBALANCING
Previous versions
AS/NZS 1270:1999
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.