Note that this Noise Protocol is just an alternative to TLS; it is not actually about adding noise to your data to prevent metadata leaking (sending noise to random people to hide contacts, sending noise to hide how much you're talking to different contacts, or just sending noise alongside messages to hide how much you're talking to one contact or how large your messages are). I'm confused every time this noise protocol comes up (apparently not often enough for me to remember right away). The "communication" in the title should also not be interpreted too specifically. It's just about two computers talking to each other, not about securing your communications by adding noise, perhaps that added to the confusion in this case.