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2450MHz radiation induces stress and anxiety like behavior in rats (2019)

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Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#81

Post by detaro »

coldtea wrote: post #79
anotherhue wrote: post #72

Earlier quoted context omitted.

An urban legend. Microwaves cause heating across a wide range of frequencies.

Not really: Consumer ovens work around a nominal 2.45 gigahertz (GHz)—a wavelength of 12.2 centimetres (4.80 in) in the 2.4 GHz to 2.5 GHz ISM band

"Microwaves" as in "the part of the electromagnetic spectrum we call microwaves".

And as they correctly point out, that consumer ovens use a specific frequency has nothing to do with it being a resonance frequency of water, but it being a reasonable to use and legal frequency to do so. They would work on 1 GHz or 5 GHz too.

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#82

Post by markenqualitaet »

PragmaticPulp wrote: post #17

This is a 2019 study. Would be more interesting if anyone else had managed to replicate it. Reading the study doesn’t inspire a lot of confidence in their methods. They make a lot of basic errors like listing dB figures (a relative term) when I think they mean dBmw (an absolute measurement). They tested multiple frequencies but for some reason only 2450MHz showed significant effects. 900MHz and 1800MHz showed no effe…

Have they controled for coil whine and similar (inaudible to humans) artifacts? Might explain a difference in frequency "response".

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#83

Post by justshowpost »

noselasd wrote: post #53
blobbers wrote: post #28

Earlier quoted context omitted.

What are you talking about? Your wifi router isn't jumping channels unless you have something fairly sophisticated (read auto channel assignment that recalibrates periodically when nobody is connected).

Doesn't most consumer wifi routers do that by now by default ?

Scanning for least congested freq is very common, but it only performed right before upping of AP iface and no else. So sweeping the band with AP is very impractical.

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#84

Post by justshowpost »

As network engineer I can reliably state what rats are showing no discrimination when chewing twisted-pair cable segments, should it connect 2.4 or 5 GHz APs, should it run Fast or Gigabit signalling, is it inline-powered or not.

I wish 802.11bg had any vermin repellent capability, but its not.

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#85

Post by luxuryballs »

justshowpost wrote: post #84

As network engineer I can reliably state what rats are showing no discrimination when chewing twisted-pair cable segments, should it connect 2.4 or 5 GHz APs, should it run Fast or Gigabit signalling, is it inline-powered or not. I wish 802.11bg had any vermin repellent capability, but its not.

Maybe they’re attacking to make it stop.

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#86

Post by BenjiWiebe »

throwaway803453 wrote: post #2

I have a small apartment and realized my WiFi router power levels are by default set to 100%. I dropped it to 25% with no meaningful reduction in bandwidth. It's a simple precaution and while I don't believe I am sensitive to RF fields maybe my neighbor's children are.

Also, I thank you on behalf of your neighbors for reducing Wi-Fi interference. If only everyone would reduce power to the minimum needed to cover their living space, interference would be less and performance would be better.

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#87

Post by jazzyjackson »

anotherhue wrote: post #74
jazzyjackson wrote: post #45

Earlier quoted context omitted.

i’m trying to google a better answer, it seems ISM bands were chosen when microwaves were a nascent technology, so it’s a bit chicken and egg

2.6 was chosen based on empirical heat penetration testing for typical target food sizes, e.g. Potatoes. GE lobbied for 2.4 instead so they could emit a noisy harmonic from a crystal based 1.2 system so the FCC agreed. Source: national archives documents I researched

Cool! I came across some quoras that suggested the electronics were easy for 2.4, but didn't give further detail. Noisy harmonics does sound useful for cooking!

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#88

Post by coldtea »

detaro wrote: post #81
coldtea wrote: post #79

Earlier quoted context omitted.

Not really: Consumer ovens work around a nominal 2.45 gigahertz (GHz)—a wavelength of 12.2 centimetres (4.80 in) in the 2.4 GHz to 2.5 GHz ISM band

"Microwaves" as in "the part of the electromagnetic spectrum we call microwaves". And as they correctly point out, that consumer ovens use a specific frequency has nothing to do with it being a resonance frequency of water, but it being a reasonable to use and legal frequency to do so. They would work on 1 GHz or 5 GHz too.

>"Microwaves" as in "the part of the electromagnetic spectrum we call microwaves".

The parent wasn't speaking about "the part of the electromagnetic spectrum we call microwaves" in general, but about what's "used in microwaves to heat our food", i.e. microwave ovens.

Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)

#90

Post by detaro »

coldtea wrote: post #88
detaro wrote: post #81

Earlier quoted context omitted.

"Microwaves" as in "the part of the electromagnetic spectrum we call microwaves". And as they correctly point out, that consumer ovens use a specific frequency has nothing to do with it being a resonance frequency of water, but it being a reasonable to use and legal frequency to do so. They would work on 1 GHz or 5 GHz too.

> "Microwaves" as in "the part of the electromagnetic spectrum we call microwaves". The parent wasn't speaking about "the part of the electromagnetic spectrum we call microwaves" in general, but about what's "used in microwaves to heat our food", i.e. microwave ovens.

I'm fairly sure they were speaking about the meaning of the word were their assertion is correct and makes sense. The urban legend part is "2.4 GHz is choosen because it's a resonance frequency" after all, not "2.4 GHz is what's used in microwave ovens".
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