Abstract：In IEC/TR 62581 technical report, A-weighted velocity sound pressure level is introduced to characterize magnetostriction, but its calculation method is not described. In view of the parameters in the formula for calculating the sound pressure level of weighted magnetostriction, this paper analyzes the methods, units and applicable conditions in detail for the parameters such as air density, sound velocity in the air, magnetostriction harmonic frequency, weighting coefficient and magnetostriction quantity. The analytical results show that the analytical method can reduce the difficulty of calculating the acoustic pressure level of A-weighted magnetostriction velocity , and improve its application range. It provides another calculation method to characterize magnetostriction.
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2019, Vol. 26 