Daniel Spiewak on Nostr: npub1c9m22…z9xjd zoom has been doing this for meeting room identification for ...

npub1c9m22hkc5h6zgrwkz48crhcpw6vch2rf6j97746ugl3neys86jeqyz9xjd (npub1c9m…9xjd) zoom has been doing this for meeting room identification for years! It works startlingly well. Rooms emit an ultrasonic pulse periodically and the client application on your device grabs this, decodes the ID, and then goes over the internet for the rest of the pairing. Doesn’t even need to be same network.