1 Scope
1.1
This International Standard describes a free-field calibration method for determining random-incidence sensitivity levels of sound level meters. Additionally, the standard describes a diffuse-field calibration method for determining diffuse-field sensitivity levels.
1.2
For the purpose of this International Standard, diffuse-field sensitivity level may be used interchangeably with random-incidence sensitivity level. Selection of calibration method depends on the facility available.
1.3
Results of calibrations conducted in accordance with this standard depend upon which components of a sound level meter are exposed to the sound field.
1.4
For the purpose of this standard, a sound level meter is considered to be a conventional sound level meter, an integrating-averaging sound level meter, or any other sound measuring system.