FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Reference environmental conditions
5 Uncertainties of measurement
6 General requirements for measurement of
adjustment value and corrections
7 Submission and inspection
8 Determination of the adjustment value at the
calibration check frequency
9 Determination of corrections for the typical
effects of reflections from the case of the
sound level meter and diffraction of sound
around the microphone
10 Determination of corrections for the deviation
of the microphone free-field frequency response
from a uniform frequency response
11 Determination of corrections for the use of
windscreens and similar accessories
12 Determination of corrections over a range of
frequencies when a sound calibrator is recommended
for use by the sound level meter manufacturer
13 Determination of corrections over a range of
frequencies when a comparison coupler is
recommended for use by the sound level meter
manufacturer
14 Determination of corrections over a range of
frequencies when an electrostatic actuator is
recommended for use by the sound level meter
manufacturer
15 Documentation
Annex A (normative) - Calibration check frequency
- Adjustment value
Annex B (normative) - Determination of the effects of
reflections from the case of the sound level
meter and diffraction of sound around the microphone
Annex C (normative) - Determination of the effects of
the use of windscreens and similar accessories
Annex D (informative) - Determination of corrections for
use with sound calibrators to determine equivalent
free-field response at all frequencies of interest
Annex E (informative) - Determination of corrections for
use with comparison couplers to determine equivalent
free-field frequency response at all frequencies
of interest
Annex F (informative) - Determination of corrections for
use with electrostatic actuators to determine
equivalent free-field frequency response at all
frequencies of interest
Annex G (informative) - Comparison techniques
Annex H (informative) - Exact one-twelfth-octave frequencies
Annex I (informative) - Example calculations of expanded
uncertainty of measurement
Bibliography