2026-06-14T03:44:52Zhttps://repisalud.isciii.es/rest/oai/requestoai:repisalud.isciii.es:20.500.12105/116492025-05-27T08:47:13Zcom_20.500.12105_2052com_20.500.12105_2051col_20.500.12105_19619
Repisalud
author
Zradziński, Patryk
author
Karpowicz, Jolanta
author
Gryz, Krzysztof
author
Morzyński, Leszek
author
Młyński, Rafał
author
Swidziński, Adam
author
Godziszewski, Konrad
author
Ramos-Gonzalez, Maria Victoria
funder
Instituto de Salud Carlos III
2021-01-22T08:33:41Z
2021-01-22T08:33:41Z
2020-12-12
Sensors (Basel) . 2020 Dec 12;20(24):7131.
10.3390/s20247131
1424-8220
Sensors (Basel, Switzerland)
33322725
http://hdl.handle.net/20.500.12105/11649
The aim of this study was to evaluate the absorption in a user's head of an electromagnetic field (EMF) emitted by the Wi-Fi and/or Bluetooth module of a wearable small Internet of Things (IoT) electronic device (emitting EMF of up to 100 mW), in order to test the hypothesis that EMF has an insignificant influence on humans, and to compare the levels of such EMF absorption in various scenarios when using this device. The modelled EMF source was a meandered inverted-F antenna (MIFA)-type antenna of the ESP32-WROOM-32 radio module used in wearable devices developed within the reported study. To quantify the EMF absorption, the specific energy absorption rate (SAR) values were calculated in a multi-layer ellipsoidal model of the human head (involving skin, fat, skull bones and brain layers). The obtained results show up to 10 times higher values of SAR from the MIFA located in the headband, in comparison to its location on the helmet. Only wearable IoT devices (similar in construction and way of use to the investigated device) emitting at below 3 mW equivalent isotropically radiated power (EIRP) from Wi-Fi/Bluetooth communications modules may be considered environmentally insignificant EMF sources.
eng
Internet of Things (IoT)
Biomedical engineering
Environmental engineering
Numerical simulations; occupational exposure
Public health
Radiofrequency sensor
Specific energy absorption rate (SAR)
Wearables
Wireless sensor network (WSN)
Modelling the Influence of Electromagnetic Field on the User of a Wearable IoT Device Used in a WSN for Monitoring and Reducing Hazards in the Work Environment
research article
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ModellingTheInfluenceOf_2020.pdf
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ModellingTheInfluenceOf_2020.pdf.txt