ASA S12.76 2017
$79.63
ANSI/ASA S12.76-2017 American National Standard Methods for Measurement of Supersonic Jet Noise from Uninstalled Military Aircraft Engines
| Published By | Publication Date | Number of Pages |
| ASA | 2017 | 36 |
None
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms and definitions |
| 14 | 4 Noise data acquisition system requirements 4.1 Microphones and preamplifiers |
| 15 | 4.2 Digital recording system |
| 16 | 5 Measurement site 5.1 Terrain 5.2 Ground impedance – optional far-field measurements only |
| 17 | 5.3 Weather requirements 6 Measurement methods 6.1 General procedures |
| 18 | 6.2 Engine performance measurement methods 6.3 Near-field method |
| 20 | 6.4 Optional far-field method using elevated microphones |
| 22 | 7 Data analysis 7.1 Weather analysis 7.2 Spectral analysis |
| 23 | 7.3 Uncorrected pressure-time histories – pressure vs. time 7.4 Corrected one-third octave-band spectra 7.5 Overall levels 7.6 Engine performance histories 8 Reporting and test documentation 8.1 Calibration records 8.2 Weather data |
| 24 | 8.3 Test log / scribe notes 8.4 Instrumentation setup log 8.5 Test location data 8.6 Ground impedance data – optional far-field measurements only 8.7 Engine performance data 8.8 Raw noise measurement data 8.9 Reduced noise data |
| 26 | 8.10 Uncertainty |
| 27 | Annex A (normative) Measurement uncertainty for near-field noise measurements A.1 Measurement uncertainty |
| 30 | Annex B (informative) Microphone cable length considerations |
| 32 | Annex C (normative) Obstructions and reflections C.1 Obstructions C.2 Field reflections check |
| 33 | Bibliography |
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