Specifies the performance requirements for three classes of sound calibrator. Sound calibrators are designed to produce a known effective sound pressure level or levels at a specified frequency or frequencies when coupled to specified models of microphone or specified configurations, for example, with or without protective grid.
WITHDRAWN
HD 556 S1:1991
WITHDRAWN
EN 60942:1998
99.60
Withdrawal effective
Apr 1, 2006
WITHDRAWN
EN 60942:1998/A1:2001
WITHDRAWN
EN 60942:2003