Exposure to 835MHz RF-EMF induces hyperactivity and demyelination in mice (2017)

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by mickelsen on Sunday April 24, 2022 @03:09AM (#31141897)

Could this be the reason why whenever I'm holding a chinese Wi-fi videoscope I bought, my hand starts to feel numb after a few minutes using it?

It's not just that it heats up, I think it's a different feeling than say holding a hot coffee cup for a long time, and can't quite rule out it's just the battery that powers it either, or that I'm practically holding the wifi chip very close while it's transmitting. But come on, it's such a tiny device!

[ Parent | on HN ]

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by throwawayrf on Sunday April 24, 2022 @03:14AM (#31141917)

Before you reach for conclusions you should at least set up a double blind experiment. Set up 8 experiments 4 on and 4 off, have a friend either plug it in (or not) while you're in the other room and see if you can feel it when you go into the room.

[ Parent | on HN ]

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by mickelsen on Sunday April 24, 2022 @04:56PM (#31148251)

It's battery powered and you only feel this numbness while operating it, on the hand you are using it, not the rest of the body. It stops once you turn it off. My girlfriend also commented on the heat, but it doesn't travel a distance other than 2-3cm, so it may be just the heat the chip/battery generates.

It also seems to be a common complaint among buyers: newer generations (like some Bebird devices) advertise a "non-heating chip" on Alibaba.

Just commented in case anyone out there tried one of these devices, they are usually not SAR rated at all and don't seek to meet industry standards, plus Wi-fi is a bigger deal than Bluetooth, otherwise everyone would be complaining about their bluetooth in-ear headsets.

[ Parent | on HN ]

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by zalo on Monday April 25, 2022 @10:02PM (#31163181)

I've noticed Apple products can feel like they buzz when plugged in, but I assumed it was just the inverter and poor grounding...

Do you think a multimeter or oscilloscope would be able to pick up the potential between the device and ground?

[ Parent | on HN ]

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by eurasiantiger on Sunday April 24, 2022 @03:16AM (#31141929)

It could also be that the device is radioactive. Always check your China gadgets with a Geiger counter, there can be some nasty surprises.

[ Parent | on HN ]

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by throwanem on Sunday April 24, 2022 @03:24AM (#31141961)

If it's radioactive enough for you to experience frank neurological effects after a few minutes holding on to it, a Geiger counter isn't going to help you nearly as much as an emergency room will.

[ Parent | on HN ]

Re:Exposure to 835MHz RF-EMF induces hyperactivity and demye... by mickelsen on Sunday April 24, 2022 @05:18PM (#31148434)

Some new age woo-woo amulets, charms and even sleeping masks have been recalled from Amazon precisely because of this, the metals they advertise as 'EMF protection' stuff are actually emitting ionizing radiation:

https://www.youtube.com/watch?v=3BA5bw1EV5I

https://www.bbc.com/news/technology-59703523

That youtube channel has the guy testing numerous objects with a geiger counter, it's esp. interesting when some 19th century tableware and other daily use objects used to contain this stuff in the past.

[ Parent | on HN ]