[throwaway202302]

What about the neighbor above/below your apartment? A ceiling of ferroconcrete is a good blocker (or a good multiplier?)

From my apartment, I can see a telecommunication tower, about 1.2 kilometers away. Wondering what it could pick up with enterprise grade antennas if it wanted to. maybe the other monitors around would disturb the signals?

https://www.usenix.org/legacy/events/sec09/tech/full_papers/...

[cushychicken]

A telecom tower has orders of magnitude more transmit power than an HDMI cable, by design. It’s also an intentional, rather than unintentional radiator. However, neither of these facts can overcome the fact that radio energy decays with the inverse square of distance, and that the noise local to the receiver on the telecom tower would swamp any fragment of energy radiated by the hdmi cable by the time it got there.