ASA S12.71 2018
$91.54
ANSI/ASA S12.71-2018 American National Standard Performance Criteria for Systems that Estimate the Attenuation of Passive Hearing Protectors for Individual Users
| Published By | Publication Date | Number of Pages |
| ASA | 2018 | 52 |
None
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 15 | 1 Scope 2 Normative references |
| 16 | 3 Terms and definitions |
| 17 | 4 Types of field attenuation estimation systems |
| 18 | 5 Performance characteristics for FAESs that report a PAR 5.1 Verification and calibration 5.2 Maximum permissible ambient noise levels (MPANLs |
| 19 | 5.3 Maximum test signal exposure levels |
| 20 | 5.4 Assessment of bias and nonlinearity 5.5 Maximum and minimum measurable attenuation values 6 Performance characteristics for FAESs that report only pass/fail indicators 6.1 Verification and calibration 6.2 Maximum permissible ambient noise levels (MPANLs |
| 21 | 6.3 Maximum test signal exposure levels 6.4 Measurement uncertainty for systems that report only pass/fail results |
| 22 | 7 Computation of A-weighted attenuation, REATA and FAESA 7.1 REATA |
| 23 | 7.2 FAESA 8 Computation of PAR and its associated uncertainty |
| 24 | 8.1 PARx 8.2 Computation of the principal sources of uncertainty |
| 26 | 9 Experimental data collection for specification of system performance 9.1 Procedure for FAESs using standard HPDs |
| 27 | 9.2 Procedure for FAESs using surrogate HPDs |
| 29 | 9.3 Procedure for FAESs that report only pass/fail results 10 Surrogate error for FAESs using surrogate HPDs 10.1 Computation of surrogate error 10.2 Statistical test for the surrogate error |
| 30 | 11 Information to be included in user instructions for FAESs |
| 31 | Annex A (normative) FAES performance statement |
| 33 | Annex B (informative) Equivalence testing to determine MPANLs |
| 35 | Annex C (informative) Example assessment of bias and nonlinearity |
| 36 | Annex D (informative) Example graphical computation of minimum and maximum attenuation values |
| 38 | Annex E (informative) Example of the computation of measurement uncertainty for a pass/fail FAES |
| 41 | Annex F (informative) Example of the computation of composite PAR F.1 Computation including audiometric data F.2 Computation in absence of audiometric data |
| 42 | F.3 Simplified computation based on lowest-ear PAR |
| 43 | Annex G (informative) Example of the computation of PAR and its associated uncertainty G.1 Computation of PAR and its associated uncertainty |
| 46 | G.2 Example cases to be used for validation of the computation of PAR and its associated uncertainty |
| 48 | Annex H (normative) Laboratory-determined values of fitting and spectrum uncertainty |
| 50 | Bibliography |
