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. |
