Analysis of the variation of the spatial-average 99th percentile induced electric field in the infant body due to influence of the adult with 50 Hz uniform magnetic fields exposure using ellipsoidal models

Human exposure to low frequency (LF) magnetic fields (MF) is frequently evaluated according to ICNIRP guidelines. Standing adults are used to determine the compliance of the standards. Nevertheless, the conservativeness of the standard for the other populations, such as the minors, has been questioned and investigated by various studies using the realistic or symbolized human models. Meanwhile, the dosimetric variation of the different postures is also evaluated. In this paper, we will use the symbolized ellipsoidal models to simulate a carrying-a-baby posture and to calculate the variation for the induced electric fields. The results demonstrate that the influence by the adult (specifically, holding a baby in arms) may significantly increase the maximum induced electric fields strength (99^th percentile spatial-average value, E₉₉) in the infant body. Physical contact on different body levels has significant impact on the induced electric fields. The results indicate that the influence by the adult is a key factor when assessing the infant exposure to the LF MF. This effect should be explored fully in formulating the safety standard.