Abstract
In IEC 1043 (Instruments for the Measurement of Sound Intensity, 2nd Committee Draft), the pressure-residual intensity index is defined for the evaluation of the phase mismatch between two channels of a sound intensity measuring instrument. However, an evaluation method of the intensity probe is not described clearly in the draft. This may cause a confusion when they are standardized and actually applied for the evalua tionof intensity measuring instruments. In this technical report, we propose a method that is carried out in an anechoic room for the evaluation of an intensity probe or an instrument as a whole. Some technically important points are also mentioned. The accuracy of this method is confirmed by comparing its result with that obtained by a calibrator.
