https://hackerpaper.kaipfister.de/p/1612.06870/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=18597097urn:hackerpapers:mention:1612.06870:18597097Tue, 04 Dec 2018 07:25:03 GMT<p>Things like this pretty much justify all the time spent procrastinating on HN. Thank you. (And also don&#x27;t thank you, this is variable reinforcement at its purest.) So if you can formulate &quot;sonic relativity&quot; like this, what happens when you trick it to provide faster-than-sound signals? Say, you emit an acoustic signal in one place, and route an electric wire with sensors and actuators that transmit it outside of the medium and re-emit as sound closer to observer. I.e. a sound-world analogue to a wormhole. Can you some (or any) of the time travel trickery that is said to be implied by any…</p><p><a href="https://hackerpaper.kaipfister.de/p/1612.06870/">Paper and discussion history</a>. A mention is not an endorsement.</p>physics.class-ph