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WiFi signals can measure heart rate

(news.ucsc.edu)
463 points bookofjoe | 2 comments | 04 Sep 25 14:53 UTC | HN request time: 0.001s | source
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supernova87a ◴[04 Sep 25 20:25 UTC] No.45131847[source]▶
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.
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nashashmi ◴[04 Sep 25 21:27 UTC] No.45132413[source]▶
What kind of helicopter of what size are we talking about here that can actually get close to a utility pole with wires going across?
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1. privatelypublic ◴[05 Sep 25 00:46 UTC] No.45133877[source]▶
HV transmission line inspection routinely has the linesmen crawl out of helicopters onto the lines and back. Granted, as far as I know its the highest skill and most difficult helicopter job.
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2. jacquesm ◴[05 Sep 25 01:12 UTC] No.45134056[source]▶
I've seen that in person while in Canada and it is most impressive. The moment they discharge the differential between the helicopter and the line is just awesome. The firebreak clearing operations are also something to behold. From a very safe distance.