ASA S12.57 2011
$86.13
ANSI/ASA S12.57-2011 / ISO 3747:2010 (R2016) American National Standard Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Engineering/survey methods for use in situ in a reverberant environment (a nationally adopted international standard)
| Published By | Publication Date | Number of Pages |
| ASA | 2011 | 60 |
None
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 13 | 1 Scope 1.1 General 1.2 Types of noise and noise sources 1.3 Test environment 1.4 Measurement uncertainty |
| 14 | 2 Normative references 3 Terms and definitions |
| 18 | 4 Test environment 4.1 Criterion for acoustic adequacy of test environment 4.2 Criterion for background noise |
| 19 | 5 Instrumentation and measurement equipment 5.1 General 5.2 Calibration 6 Location, installation and operation of noise source under test 6.1 Source location and installation |
| 20 | 6.2 Auxiliary equipment 6.3 Operation of source during test 7 Measurement procedure 7.1 General |
| 21 | 7.2 Characterization of noise source under test 7.3 Locations of the reference sound source |
| 22 | 7.4 Microphone positions |
| 23 | 7.5 Measurement of sound pressure levels for a noise source which emits steady or nonsteady noise |
| 24 | 7.6 Measurement of sound pressure levels for a noise source which emits impulsive noise 8 Calculation of sound power levels and sound energy levels 8.1 Corrections for background noise |
| 25 | 8.2 Mean time-averaged sound pressure levels for a noise source which emits steady or non-steady noise |
| 26 | 8.3 Sound power levels 8.4 Mean single event sound pressure level for a noise source which emits impulsive noise |
| 28 | 8.5 Sound energy levels 8.6 A-weighted sound power level and A-weighted sound energy level 9 Measurement uncertainty 9.1 Methodology |
| 29 | 9.2 Determination of .omc |
| 30 | 9.3 Determination of .R0 |
| 31 | 9.4 Typical upper bound values of .R0 |
| 32 | 9.5 Total standard deviation, .tot, and expanded uncertainty, U 10 Information to be recorded 10.1 General ii © 2011 Acoustical Society of America—All rights reserved. 10.2 Noise source under test 10.3 Test environment |
| 33 | 10.4 Instrumentation 10.5 Acoustic data |
| 34 | 11 Test report |
| 35 | Annex A (normative) Evaluation of the excess of sound pressure level at a given distance |
| 36 | Annex B (informative) Recommendations for the location of the reference sound source and the microphones, if only one position is used for the reference sound source B.1 General B.2 Recommendation 1 |
| 38 | B.3 Recommendation 2 |
| 39 | B.4 Recommendation 3 B.5 Recommendation 4 |
| 41 | Annex C (normative) Sound power level and sound energy level under reference meteorological conditions |
| 43 | Annex D (normative) Calculation of A-weighted sound power levels and A-weighted sound energy levels from octave-band levels D.1 A-weighted sound power levels D.2 A-weighted sound energy levels D.3 Values of k and Ck for use in calculations |
| 45 | Annex E (informative) Guidance on the development of information on measurement uncertainty E.1 General E.2 Considerations on the total standard deviation, .tot |
| 46 | E.3 Considerations on .omc |
| 47 | E.4 Considerations on .R0 |
| 56 | E.5 Combined standard uncertainty E.6 Measurement uncertainty based on reproducibility data |
| 57 | Bibliography |
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