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2450MHz radiation induces stress and anxiety like behavior in rats (2019)
51–60 of 96 posts
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#52Earlier quoted context omitted.
To expand, apparently microwaving food right at the absorption peak sucks because of low penetrance, heating only the top layer of the food. The reason 2.4 GHz was chosen was purely as that is where the ISM band already was at the time.
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
Yeah, I do not think I have a good source at hand, this is a fun fact from an E&M lecture we had.
I also wonder if anyone actually experimented with microwaving their dinner at 10GHz or if that was just an educated guess. X-band magnetrons for radars are widely available though, so I would not be surprised if that was coming from practical experience...
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#53Earlier quoted context omitted.
The issue that the ISP doesn't want complaints so those routers are always set to auto-hop at maximum speed. Since most apartment complexes use the same company, the hops are always around the same time so you basically have these routers screaming at maximum speed and moving between channels.
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 ?
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#54This 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…
There's more peer-reviewing on HN, than the actual peer-reviewing.
Peer review in and of itself is of limited value, and usually reveals cosmetic, as opposed by structural, errors. How many code reviews can be summarized by the letters "L", "G", "T", and "M"?
Replication matters. The echo chamber of peer review much less so.
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#55A fancy way of saying that microwaving rats makes them warmer and more comfortable. Now where's my $100K research grant?
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#56This 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…
1800MHz is not that close to 2450MHz. Behavior in air is different, for one, and the properties that dictate this, the vibrational modes of atoms and so on, are extremely selective.
Not just atoms, you could be hitting something specific in terms of resonance at 2.45ghz.
Maybe rats skull size is perfectly resonant at that frequency, who knows.
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#57Some say Havana syndrome is caused by microwave radiation.
The sun also emits microwaves, so stay out of the sun.
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#58A fancy way of saying that microwaving rats makes them warmer and more comfortable. Now where's my $100K research grant?
You’re an idiot..
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#59Earlier quoted context omitted.
To expand, apparently microwaving food right at the absorption peak sucks because of low penetrance, heating only the top layer of the food. The reason 2.4 GHz was chosen was purely as that is where the ISM band already was at the time.
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
Not really an answer, but here's some context...
In 1952, a paper called Tubes for dielectric heating at 915 megacycles said this, "Dielectric heating can be much faster at microwave frequencies. Because leakage radiation is large enough to interfere with communications, heating is best done at assigned frequencies. The bands at 915 and 2,450 megacycles are most useful."
Re: 2450MHz radiation induces stress and anxiety like behavior in rats (2019)
#60Earlier 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
Yeah, I do not think I have a good source at hand, this is a fun fact from an E&M lecture we had. I also wonder if anyone actually experimented with microwaving their dinner at 10GHz or if that was just an educated guess. X-band magnetrons for radars are widely available though, so I would not be surprised if that was coming from practical experience...
A review of the history of microwave cooking implies that the interaction of 10 GHz microwave radiation with water was understood by WWII.
"effective penetration and heating favors wavelengths in the cm range (1–30 GHz). Higher frequencies cannot penetrate sufficiently, and much lower frequencies require very high fields, and can have poor coupling unless making use of direct contact or inductive heating. In the years following WWII, emphasis was thus placed on frequencies in the low GHz region, where both the historic development of microwave power sources and serendipity converged."
https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9393469