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. 2017 Nov 20;5:279. doi: 10.3389/fpubh.2017.00279

Table 6.

Teacher SG1, October 17–18, 2016, analysis of all data (microwatts per square meter) by frequency band treating values at detection limit as 0.

Frequency band Mean Median Min Max
FM 0.0 0.0 0.0 7.2
TV3 0.0 0.0 0.0 1.1
TETRA I 0.9 0.6 0.0 36.3
TETRA II 0.3 0.0 0.0 39.5
TETRA III 1.0 0.7 0.0 28.1
TV4&5 0.0 0.0 0.0 4.5
LTE 800 (DL) 27.5 16.6 0.0 676.5
LTE 800 (UL) 0.1 0.0 0.0 105.0
GSM + UMTS 900 (UL) 0.0 0.0 0.0 1.7
GSM + UMTS 900 (DL) 10.7 8.3 0.1 173.8
GSM 1800 (UL) 0.3 0.0 0.0 371.0
GSM 1800 (DL) 0.3 0.3 0.0 2.5
DECT 0.0 0.0 0.0 42.8
UMTS 2100 (UL) 0.0 0.0 0.0 8.3
UMTS 2100 (DL) 3.3 2.9 0.0 52.7
Wi-Fi 2.4 GHz 1.6 0.6 0.0 229.3
LTE 2600 (UL) 0.0 0.0 0.0 43.5
LTE 2600 (DL) 16.0 9.5 0.0 343.8
WiMAX 0.0 0.0 0.0 0.0
Wi-Fi 5 GHz 4.0 1.3 0.0 566.2
Total 66.1 51.8 1.7 715.9

Totally 13,505 readings for each frequency band. Results for a school with a weaker wireless fidelity network. Both students and teachers connected their mobile phones to base stations outside school.