The science is mostly focussed on mobile phones for good reason, because they’re emitters carried close to the body, and typically used against the head in calls. The WiFi and RF devices sold here are likely very safe. There are points about frequency and power in the research, the frequency is important, low power levels can be picked up by the human body and registered as a stress response by looking at hormone levels. I don’t know how low a power level, there are some EU guidelines on this, but the place to look is Russia where very low safe limits were set following their research in the early 1900’s. More modern research also suggests the body has an EM immune system, and similar frequencies are essentially adapted to and become not stressful.
Aluminium layered foils and insulation boards are used a lot in timber frame construction, which would make more of an effect than masonry for example. Even in modern cavity wall, thin boards of aluminium faced board are used.
If we’re living in a kind of Faraday cage, unfortunately the potential problems are the emitters within the home. Like I say, I don’t use a mobile phone for calls hardly ever, I use WiFi for calling alot and the Three network has an app which allows calls and sms through WiFi. This is possibly financially motivated by skipping out the mobile towers or something, but convenient where I live, in a thick-walled house, mostly avoidant to using typical mobile phone EM anyway. Remember when people were complaining of headaches with mobile in the 90s? The tech has come along way since then… Regardless, when I last went 6 months without using mobiles, about 3 years ago this was, and I started making calls again, I noticed very strongly the sensation of a modern phone during a call, a Samsung S4 I think it was. The sensation went away with more use, so it became normal again.
5G will fry our brains, maaan.
I thought higher frequencies had more energy? How is the power halved?