Abstract

As a portable calibration media, acoustic comparison coupler has been designed, and therefore, it is intended to be applied for acoustic instrument calibration such as sound level meter and noise dosimeter. In addition, its performance has been discussed in the previous paper, where the result is acceptable to be used further. However, the calibration result using this prototype has not been identified yet. In this work, testing of the sound level meter according to the international standard IEC 61672 has been implemented using this acoustic calibration media by the two methods that consist of substitution method and direct comparison method. Therefore, the frequency weighting was chosen as the representative parameter. In addition, the result shows that the deviation of calibration result between these methods is slight for the aforementioned parameter.

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