# Radio Frequency Electromagnetic Fields Exposure Assessment in Indoor Environments: A Review
## 4 Discussion
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c c c c} \hline \hline  & & \multicolumn{3}{c}{**Offices**} & \multicolumn{3}{c}{**Education**} & \multicolumn{3}{c}{**Residential**} & \multicolumn{3}{c}{**Other Public**} & \multicolumn{3}{c}{**Transportation**} \\  & & **Buildings** & \multicolumn{3}{c}{**Buildings**} & \multicolumn{3}{c}{**Building**} & \multicolumn{3}{c}{**Generic**} & \multicolumn{3}{c}{**Bus**} & \multicolumn{3}{c}{**Train**} & \multicolumn{3}{c}{**Trans/Metro**} & \multicolumn{3}{c}{**Car/Taxi**} \\ \hline
**Frequency Band** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** & **E (V/m)** \\
**(MHz)** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** & **Mean Values** \\ \hline  & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** \\ \hline
**Total RF-EMF** & **0.07** & **1.14** & **0.07** & **0.54** & **0.13** & **0.81** & **0.15** & **0.99** & **0.14** & **0.97** & **0.14** & **0.75** & **0.23** & **0.97** & **0.26** & **0.82** & **0.18** & **0.86** \\ \% of KNIRP ref. lev. & 0.3\% & 4\% & 0.3\% & 1.9\% & 0.5\% & 2.9\% & 0.5\% & 3.5\% & 0.5\% & 3.5\% & 0.5\% & 2.7\% & 0.8\% & 3.5\% & 0.9\% & 2.3\% & 0.6\% & 3.1\% \\ Reference & [79] & [70] & [52] & [70] & [56] & [59] & [75] & [79] & [62] & [5] & [62] & [81] & [62] & [5] & [2] & [79] & [62] & [61] \\ \hline
**Broadcasting** & & & & & & & & & & & & & & & & & & & & & \\ FM & 88–108 & 0.03 & 0.21 & 0.01 & 0.32 & 0.02 & 0.11 & 0.02 & 0.11 & 0.02 & 0.12 & 0.03 & 0.12 & 0.02 & 0.05 & 0.08 & 0.11 & 0.03 & 0.12 \\ Reference & [21] & [70] & [52] & [70] & [83] & [60] & [21] & [21] & [21] & [20] & [80] & [62] & [80] & [20] & [5] & [21] & [62] & [25] & [20]  
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c c c c c c} \hline \hline  & & \multirow{2}{*}{**Offices**} & \multicolumn{2}{c}{**Education**} & \multicolumn{2}{c}{**Residential**} & \multicolumn{2}{c}{**Other Public**} & \multicolumn{5}{c}{**Transportation**} \\  & & & **Buildings** & **Buildings** & **Buildings** & **Generic** & **Bus** & **Train** & **Train/Metro** & **Car/Tixi** \\ \hline
**Frequency Band** & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} & \multicolumn{2}{c}{**E (V/m)**} \\
**(MHz)** & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} & \multicolumn{2}{c}{**Mean Values**} \\ \hline  & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** & **min** & **max** \\ \hline
**Downlink Sources** & & & & & & & & & & & & & & & & & & & & \\ Total DL & 0.04 & 0.18 & n.a. & n.a. & 0.04 & 0.23 & 0.04 & 0.94 & 0.01 & 0.85 & 0.01 & 0.39 & 0.07 & 0.33 & 0.23 & 0.53 & 0.12 & 0.85 \\ Reference & [83]  
The second highest maximum mean value of total exposure was observed in public transport, equal to 0.97 V/m. This finding was highlighted also by single studies (see, e.g., [2; 5; 20; 21]).