ANSI S12-5:2006

1 Scope
2 Normative references
3 Terms and definitions
4 Reference meteorological conditions
5 Performance requirements
6 Instrumentation
7 Installation and operation of the reference sound source
   during calibration
8 Calibration procedure in hemi-anechoic rooms
9 Calibration procedure in reverberation test rooms
10 Alternative calibration procedure at low frequencies
11 Measurement uncertainty
12 Information to be recorded
13 Information to be reported
Annex A (informative) - Guidance on the determination
        of C[2]
Annex B (normative) - Alternative calibration procedure
        at low frequencies
Bibliography

Defines the acoustical performance requirements for reference sound sources: - temporal steadiness (stability) of the sound power output; - spectral characteristics; and - directivity.