ASA S12.6 2016
$91.54
ANSI/ASA S12.6-2016 American National Standard Methods for Measuring the Real-Ear Attenuation of Hearing Protectors
| Published By | Publication Date | Number of Pages |
| ASA | 2016 | 50 |
None
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 13 | 1 Scope 1.1 Scope 1.2 Applications |
| 14 | 2 Normative references |
| 15 | 3 Terms and definitions |
| 16 | 4 Physical requirements of the test facility 4.1 Test signals 4.2 Test site |
| 17 | 4.3 Test apparatus |
| 19 | 4.4 Head position reference device 4.5 Observation of subjects during testing 5 Test subjects 5.1 Anatomical features |
| 20 | 5.2 Otoscopic inspection 5.3 Measurement of earcanal size and head dimensions 5.4 Gender balance 5.5 Hearing sensitivity 5.6 Threshold variability (during qualification |
| 21 | 5.7 Eyeglasses and jewelry 5.8 Number and method of selection of subjects 6 Product samples 6.1 Minimum number of samples 6.2 Earplugs connected via a flexible retaining cord |
| 22 | 6.3 Devices with variable band force adjustments 6.4 Special requirements for inexperienced-subject-fit method 7 Psychophysical procedure 7.1 Informing the subject 7.2 Positioning the subject 7.3 Number of open and occluded threshold measurements |
| 23 | 7.4 Threshold measurement method – Békésy tracking procedure 7.5 Threshold sensitivity at time of testing 7.6 Open threshold variability within a test session 7.7 Quiet period prior to first threshold measurement 7.8 Waiting period subsequent to fitting hearing protector |
| 24 | 8 Method A: Trained-subject fit 8.1 Training in fitting hearing protectors 8.2 Conditions for subject dismissal 8.3 Test procedures |
| 25 | 9 Method B: Inexperienced-subject fit 9.1 Conditions for subject acceptance/dismissal |
| 26 | 9.2 Test preparation |
| 28 | 9.3 Test procedure ANSI/ASA S12.6-2016 ii © 2016 Acoustical Society of America – All rights reserved 10 Band force |
| 29 | 10.1 Earmuffs 10.2 Semi-insert devices 11 Processing and reporting the data 11.1 Recording the data 11.2 Computation of real-ear attenuation |
| 30 | 11.3 Estimation of the uncertainty and procedures for assuring laboratory conformity 11.4 Information to be included in test report |
| 31 | 11.5 Graphical presentation of the data |
| 32 | Annex A (informative) Uncertainty of hearing protector attenuation measurements A.1 General |
| 33 | A.2 Uncertainty within a laboratory |
| 34 | A.2.1 Application of the expanded uncertainty A.2.2 An example |
| 35 | A.3 Uncertainties between laboratories |
| 36 | A.3.1 Application of the expanded uncertainty |
| 37 | Annex B (normative) Procedure for measuring earcanal sizes and head dimensions |
| 39 | Annex C (informative) Checklist for implementing Methods A and B |
| 41 | Annex D (normative) Procedure for measurement of the band force of semi-insert devices |
| 44 | Annex E (normative if accreditation is sought) Requirements for accreditation |
| 47 | Bibliography |
Related products
-
ASA S12.6 2020
ANSI/ASA S12.6-2016 (R2020) – American National Standard Methods for Measuring the Real-Ear Attenuation of Hearing…
