HD2020 – Class 1 Sound Level Calibrator

The HD2020 sound level calibrator is a portable, battery-operated sound source, suitable for sound level meters (portable and laboratory) and acoustic stations. It allows calibrating ½” microphones with mechanical dimensions compliant with IEC 61094-1 and IEC 61094-4. The calibration pressure levels of 94dB and 114dB can be selected by the keypad. The 1000 Hz frequency cannot be changed.