Sound Level Calibrators - Acoustic Calibrators

A Sound Level Calibrator or Acoustic Calibrator is a hand-held device that emits an audible tone of very accurate level and frequency. Before making noise measurements the Calibrator is fitted over the meter's microphone and the reading is either checked manually by the user or automatically by the meter.

Checking a meter's calibration is always good practice and for many applications it is essential. Most regulations, like the Noise at Work Regulations, demand that the meter is calibrated before making measurements. Records should be kept of these calibrations as evidence that the correct procedures have been followed.