1 Scope
2 Normative references
3 Definitions
4 Calibration method based on free-field measurements
5 Calibration method based on diffuse-field
measurements
Annexes
A (Informative) Practical calibration method based on
free-field measurements
B (Informative) Pra?ctical calibration method based on
diffuse-field measurements
ZA (Normative) Other international publications quoted
in this standard with the references of the relevant
European publications
Tables
A.1 Adjustment factors K(0) for calculation of random-
incidence sensitivity level
B.1 Characteristics of a type LS2aP/LS2F microphone
Figures
1 Reference coordinate system for random-incidence
sensitivity level calibration based on free-field
measurements
2 Reference coordinate system for the purpose of
practical measurement of random-incidence sensitivity
level based on free-field measurements
A.1 A sound level meter located with its microphone at
the centre of a sphere and a reference direction for
sound incidence aligned with the X-axis
A.2 A sound level meter under test mounted on a turntable
to obtain incidence of sound from different directions
in the X-y plane
A.3 Method of simulating rotation in the X-Z plane by 90
degrees rotation of the sound level meter under test
around an axis coincident with the reference
direction, and then rotation around a circle in the
X-Y plane as in figure A.2