Calibration Methodologies and the Accuracy of Acoustic Data (original) (raw)
The precision and accuracy of acoustic instrument calibrations is fundamental in ensuring the validity and defensibility of acoustic measurements. The measurement error is additive to the overall uncertainty or error associated with acoustic calculations and modelling techniques, where these rely on measurement data as a source of acoustic data. Therefore, the tolerance of the calibration is a fundamental component in determining the accuracy of all applications that rely on acoustic measurement data. National and International metrology standards define the methodologies adopted in acoustic calibration. Currently the IEC 61672 standard is adopted for the periodic testing of field instruments. This paper provides an overview of the changes in calibration requirements of the IEC 61672 standard relative to the earlier versions of IEC 61672 and the IEC 652 standard. The paper then explores in more detail from an end user perspective the implications of calibration methodologies and the...
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