Review on 🎤 Calibration of Professional Microphone through Precision Measurement by Alfredo Testerman

This professional sound level calibrator. It is very well made and works great. I checked two sound level meters and they were correct. I find the digital display a bit superfluous - a simple switch with two calibrator tones would do - but that doesn't detract from the quality of this instrument. If you need to check the calibration of a sound level meter, this calibrator comes highly recommended.