FOREWORD
INTRODUCTION
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
- Determination of the 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
Annex ZA (normative) - Normative references to
international publications with their
corresponding European publications