Yes. The Ranos dB is calibrated before shipping and comes with a factory calibration. Regular sound level calibrations can be done with a Calibrator. In Dashboard+, measurement deviations can be corrected.

The Ranos dB frequency response is calibrated at the factory to be within +/- 2 db, at the moment this can only be done by DSS. You can perform periodical sensitivity calibration yourself, using standard calibrator mounted to the microphone producing a 1kHz tone at 94 or 114 dB(A/C). The sensitivity offset can be adjusted in the settings of the sensor in your dashboard.