Since 99% of the measurement microphones in use today come equipped with plastic diaphragms, (iPrecisionMic and uPrecisionMic use titanium!), there is always the chance that a short exposure to higher or lower temperatures than normal, or even high humidity or sudden shock can knock even high-quality microphones out of calibration. Usually this is only a few dB, but this may be important to your work.

The solution is to have a reliable microphone calibrator in your arsenal of test equipment, and we have tested a number of them and sourced one that meets our standards. And, so that we are not leaving anything to chance, every unit is checked, and if required, adjusted, against a B&K 4230 calibrator that has been recently certified.

If you are working on a critical job, the suggested use case is to check the calibration of the mic both before and after doing the tests.

Our Cal-1 fits all nominal 1” and 1/2” microphones, and supplies a 1kHz tone at 94db (1Pa) and 114dB (2Pa). We recommend using the 94dB setting for most applications. Check with your distributor or by through our online store by clicking below.

The calibrator has two multi-turn potentiometers that are accessed from within the battery compartment that can be used to adjust the 94 and 114 dB output levels. This should only be done by a qualified technician or lab, comparing to a known reference calibrator.