###### Abstract  
The daily use of devices generating electric and magnetic fields has led to potential human overexposure in home and work environments. This paper assesses the possible effects of electric fields on human health at low and high frequencies. It presents an electronic monitoring device that captures the incidence of specific absorption rate (SAR) and temperature variation (\(\Delta\)T) on the human body. The system transmits data to a cloud platform, where a feedforward neural network (FFNN) processes the received information. SAR and surface temperature values are detected in an indoor environment, monitoring stationary and moving subjects. The results effectively assess temperature distribution due to electromagnetic fields. The prototype detected temperature peaks and high SAR values when the subjects remained motionless. Predictive analysis confirms the need for workplaces with materials shielding external electromagnetic signals and attenuating internal sources. Moderate mobile phone use could lower SAR and temperature values. electronic monitoring system; infrared thermography; specific absorption rate; biological; FFNN Article  
25 January 2025  
19 February 2025  
25 February 2025  
25 January 2025  
body absorbs [15]. Furniture placement and the presence of multiple radiation sources can lead to scattered or concentrated exposure zones. The movement of individuals also alters electromagnetic coupling, changing SAR distribution in real time. Muscle tissues, due to their conductivity, experience variable absorption depending on ventilation and ambient temperature [16]. SAR is a key metric for assessing EMF safety, as it quantifies the electromagnetic energy absorbed by biological tissues [17]. Thermal effects result from increased tissue temperature, particularly in the brain, where localized heating can affect neuronal activity. Although the increase in temperature is often minimal, long-term exposure raises concerns about cumulative effects [18]. Non-thermal biological effects, such as oxidative stress, altered cellular communication, and potential DNA damage, remain under investigation [19]. Different tissues exhibit varying responses to electromagnetic exposure [20]. The eyes and testicles, for instance, have a limited capacity to dissipate heat, making them particularly vulnerable [21; 22; 23]. At high frequencies (e.g., 5G networks), electromagnetic absorption is superficial, affecting the skin. Lower frequencies allow deeper penetration, potentially impacting internal organs. Blood circulation plays a crucial role in dissipating heat, but poorly vascularized areas--such as the eye lens--are more susceptible to overheating [24]. Even small temperature increases (1-2 \({}^{\circ}\)C) can disrupt biochemical reactions and cellular homeostasis [25]. Wireless networks, now ubiquitous in homes, workplaces, and public spaces, expose individuals to continuous low-level electromagnetic radiation [26]. Unlike periodic exposure from mobile phone use, Wi-Fi networks operate persistently, radiating electromagnetic fields throughout the day. The research suggests that prolonged exposure may have physiological implications, particularly in confined spaces where electromagnetic waves accumulate [27]. Although numerous studies have shown that there are adverse effects to prolonged exposure to electromagnetic radiation, it is also worth considering the scientific literature that reports the absence of significant impacts on human health under controlled exposure conditions. The evaluation of electromagnetic exposure shows that radiation levels are generally below the safety thresholds set by international bodies, reducing the risk of documented adverse effects [28]. A thorough SAR analysis has shown that most wireless devices are within the established safety limits, with no evidence of adverse health effects [29].