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The wireless networks technologies are becoming more prevalent. As part ofour courses, we have to deal with the technical aspects of these technologies.However, the experience of mobile telephony has shown fears that these productscan lead to the general public. The latter comes from the use ofelectromagnetic waves at frequencies close to the frequencies of microwavesoven(2.45 GHz). Studies are under way for years in order to identify thepossible effects on the body related to prolonged use of mobile phones.Wireless networks like WiFi or ZigBee for example works with microwavefrequencies. On the other hand, problems relating to electromagneticcompatibility waves with the electronic devices must also be studied. Thequestion of the safety of these technologies must be addressed with thestudents. They will may need to install such equipment. We have integrated theteaching of wireless networks in a chapter dealing with current standards ofexposure to electromagnetic waves for living beings and the electronic devices.The aim of our approach is the obtention of knowledges by the student. so hewill be able to form an opinion and to provide a speech enlightened to futureusers of these networks. To this end, we have developed a visualization toolfor the distribution of electromagnetic fields. This tool being used will helpyou understand the electromagnetic environment in which we live and quantifythe values of electromagnetic fields (telephony, television, radio, WiFi,Bluetooth, ZigBee, microwave oven, etc.).

Approche p\'edagogique sur l'innocuit\'e des technologies de r\'eseaux sans fil