5 ms·
Wrap it in foil and stick it in the oven!
by slicktux 3y ago
Wrap it in foil and stick it in the oven!
- qwertox 3y agoNot sure if it was a joke, but shouldn't a microwave oven shield the 2.4 GHz band pretty well?
- bonzini 3y agoThe article says > I also tried putting my phone in a (turned off!) microwave, but this did not work either, it was still connected to the Wi-Fi access point. But yeah I would have thought the same.
- deleted 3y ago[deleted]
- bboygravity 3y agoAnecdotal: I've heard that in Europe EM emissions directives have exceptions for microwave ovens, because without the exceptions none of them would pass the tests and make it to market. Never checked if true. But that could explain why they're so "leaky" at 2,4 Ghz (and other frequencies).
- namibj 3y agoThe radiation is in an ISM band, which has no far field emissions limits beyond "be reasonable". The close-range limits are about safety for living being and other devices nearby, so e.g. not cooking you, and not frying your phone's WiFi receiver.
- bonzini 3y agoIn terms of dB they're not that leaky. However when the typical wifi power is on the order of microwatts or tens of nanowatts, it's not hard for an 800 W oven to completely drown that signal and/or overload the front-end.
- HALtheWise 3y ago> I also tried putting my phone in a (turned off!) microwave, but this did not work either, it was still connected to the Wi-Fi access point. Apparently modern wifi chips are just too good at picking up faint signals.
- ComputerGuru 3y agoImplying faint microwave signals also make their way out, of course.
- BenjiWiebe 3y agoI have heard of WiFi slowing down when a microwave is running. Also when a phone is in a microwave, the RF noise is also attenuated, so that helps a little (amplifier noise is unaffected).
- MauranKilom 3y agoMy wireless headphones get an unbearable amount of pops and cracks when I'm wearing them close to my (running) microwave. But since I wear them virtually always, I am in effect virtually never next to my microwave when it's on :)
- namibj 3y agoYeah the shielding is to not cook your eyeballs if you observe the food, and to not cook anything else outside of the chamber, including e.g. your phone's wifi receiver.
- PeterisP 3y ago"pretty well" means 40-ish dB attenuation - that's about 10000 times weaker signal, absorbing 99.99% of it. But that's not even close to sufficient for actually isolating wireless transmissions. My microwave got 35-38 dB for WiFi signals when I measured it, and that got through a fairly reliable connection. You might want 90 dB or something like that if you want to ensure that you can't extract the data from the noise - so perhaps a starting point might be to put your device in a small microwave oven and put that oven in a large microwave oven :)