# Assessment of Electromagnetic Exposure to a Child and a
## 5 Results
### Specific Absorption Rate over 10 g (SAR10g) and Temperature Variations
#### 5.1.2 Cell Phone Transmission Frequency of 1800 MHz (SAR10g &Tmax)  
For the child, Roberta, the absorption intensity over 10 g analytical results and heat changes under 1800 MHz mobile frequency, are graphically presented in Figure 8.  
At 1800 MHz, in Roberta the highest local absorption density over 10 g and temperature peak values occur when the mobile phone is used in the vertical position, both in an open environment and enclosed elevator cabin. The tilt placement of the phone, however, results in the lowest peak rate of electromagnetic absorption over 10 g values and the smallest maximum temperature increases in both environments of dosimetry scenarios. Notably, the Tmax values in the vertical position are marginally higher than in the cheek position, in both open-air setting and interior of the elevator cabin.  
The maximum electromagnetic dose rate over 10 g value is measured at configuration 8 in free space and at configuration 4 within the elevator cabin. The minimum absorption rate 10 g values at 1800 MHz found at configuration 1 in free space and at configuration 3 inside the elevator cabin. The induced elevation of the temperature reaches its highest value in free space at configuration 1, while inside the elevator cabin, the peak occurs at configuration 8. In both environments, the lowest Tmax is observed in configuration 1.  
As far as the Pregnant II and its fetus, respectively, are concerned, in Figures 9 and 10 the specific deposition rate is over 10 g and the Tmax are displayed under the operating condition of 1800 MHz frequency.  
Similarly to 1000 MHz case, the maximum absorption rate over 10 g and thermal zenith values for pregnant woman are found at the numerical human's configuration 2 occurring at the tilt placement of the phone, in both open environment and enclosed elevator cabin. The lowest local absorption density over 10 g values is found in parallel phone position, at configuration 7 in free space and at tilt position at configuration 6 inside the elevator cabin. Among the eight configurations of the anatomical replicas, the configurations 1, 2, and 3 consistently result in higher values for the pregnant woman, with the tilt phone position producing higher values compared to the other two positions. Notably, the maximum recorded temperature increases in the two environments is measured in tilt phone position, configuration 2, while the minimum is found at parallel position, configuration 8.  
Figure 8: Chart display of SAR10g [W/kg] and peak temperature increase (Tmax) [\({}^{\circ}\)C] values in the Roberta model at 1800 MHz with the cellphone operating at an output power of 1 W. Eight different anatomical phantom setups and three mobile phone placements, inside an elevator and at open space were assessed. The bar graphs indicate specific absorption rate values, whereas the line plots represent temperature data.  
As far as the fetus is concerned, the specific energy absorption over 10 g and Tmax distributions align closely with those at 1000 MHz across all simulation scenarios. The highest tissue energy density over 10 g and Tmax values both occur at configuration 2 in the tilt phone position. The lowest local absorption over 10 g peak and the lowest temperature rise measured at configuration 6, positioned parallel in an open environment and tilted within the elevator cabin.