SV 31 Class 1 Acoustic Calibrator offerd calibration on 114 dB at 1 kHz. The design is based on the dedicated ½ condenser microphone and microprocessor controlled signal source including digital static pressure and temperature compensation. These both features assure excellent stability of the calibration level and its frequency. With the SV31 acoustic calibrator it is possible to calibrate the ½ microphones and ¼ microphones using SA30 diameter reduction.
