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. |
