WiFi signals can measure heart rate

Hey, I heard about how utility pole inspecting helicopters are able to tell the good/rotten state of wooden telephone poles by the reverb pattern of sound waves coming off the poles from the rotors -- it seems to me the whole field of non-invasive sensing (and using existing/ambient emission sources) is getting pretty impressive.

In telecommunications construction we are taught to make ample use of the "hammer test" when working on and around poles. The difference in sound between a good pole, a marginal pole and a completely rotten pole is quite significant.

You could of course just bury your lines.

Too expensive where I live. Rocks, hills and trees: the natural enemies of buried fibre and wireless networks. One of my competitors took 6 months to bury a cable in granite that would've been a 5 day aerial job.

I'm so glad you say that. Resi aerial is perfect in most locations. No dig, no service boxes in front yards, under someone's unpermitted driveway pour, ample power easily, a guy in a bucket truck is all you need. Trenchless works well when it can, but even reasonable infrastructure underground is twice as expensive. I love seeing a neighborhood lit up in fiber in 2-5 days and subscribers online at 1-10Gb in soooo many places. Keeps crews busy either way :D

> a guy in a bucket truck is all you need

Downside is: a drunk guy in a truck is all you need to tear it down, not to mention natural disaster influence. And it's unsightly AF.

Yes, it's fast and cheap. That's how we got the situation that a backwater village in the midst of the "anus mundi" of Romania has XGPON for a few dozen euros a month, while you're lucky to get anything above 50M VDSL in Germany outside of large urban areas and 200M VDSL in urban areas.

But holy hell it's an eyesore to be in said village in Romania, look out the window and look at a bunch of fiber strung not even from a proper pole but from a tree. Takes the German expression "Kabelbaum" to a whole new level.

And outdoor DSLAMs are invulnerable, to cars, vandalism, dog-piss, whatever? Ever walked by one in the middle of the night, when its cooling fans hum? Wanna live near that?

GPON outdoor units don't create any noise, they are purely passive.