Calibration – Sound Level Meters
Accredited calibration of the sound level meter. Measurement method compliant with PN-EN 61672-3: 2007 or PN-EN 61672-3: 2014. The measurement service includes indication of : • values of corrections taking into account the deviation of the frequency characteristics of the microphone in free field • error at the calibration frequency • self noise of a meter with a microphone • self noise of a meter with an equivalent impedance • frequency correction characteristic by means of an acoustic and an electrical signal • long-term stability • frequency and time correction characteristics at 1kHz • linearity in the reference range (but also in other ranges as requested by the Client) • linearity taking into account the influence of the level range switch • response to tone impulse • peak C sound level • overload threshold • stability at high signal levels.
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