Calibration – Sound Level Meters
About
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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