ASA S12.5 2016

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ANSI/ASA S12.5-2016 / ISO 6926:2016 American National Standard Acoustics – Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels (a nationally adopted international standard)

Published By	Publication Date	Number of Pages
ASA	2016	36

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PDF Catalog

PDF Pages	PDF Title
13	1 Scope
14	2 Normative references 3 Terms and definitions
17	4 Reference meteorological conditions 5 Performance requirements 5.1 General 5.2 Temporal steadiness (stability) of sound power output
18	5.3 Total broadband sound power level 5.4 Spectral characteristics 5.5 Directivity
19	5.6 Recalibration
20	6 Instrumentation 6.1 General 6.2 Microphone in a hemi-anechoic room 6.3 Microphone in a reverberation test room 6.4 Microphone frequency response correction
21	6.5 Verification 6.6 Microphone calibration check 7 Installation and operation of the reference sound source during calibration 7.1 General
22	7.2 Requirements in hemi-anechoic rooms 7.3 Requirements in reverberation rooms 8 Calibration procedure in hemi-anechoic rooms 8.1 Test environment 8.2 Microphone positions
23	8.3 Measurements
24	8.4 Calculations
25	9 Calibration procedure in reverberation test rooms 9.1 Test environment 9.2 Microphone positions 9.3 Measurements
26	9.4 Calculations 10 Alternative calibration procedure at low frequencies
27	11 Measurement uncertainty 11.1 General 11.2 Typical values of the reproducibility standard deviation
28	12 Information to be recorded 13 Information to be reported
30	ii © 2016 Acoustical Society of America – All rights reserved Annex A (informative) Guidance on the determination of C2 A.1 General A.2 C2 for some type sources
32	Annex B (normative) Alternative calibration procedure at low frequencies B.1 Procedure B.2 Data to be reported
33	Bibliography