Introverts / People with Social Anxiety: If the internet didn't exist, and the closest thing we got were Ham Radios, would you have the courage to use your voice and talk to people?
For me... yea that's gonna be a challenge. I'm glad a text-based social platform exist, I hate talking. Maybe I'd just use morse code...?
You're a couple layers off in the protocol stack, but yes. AFSK (Audio Frequency Shift Keying) is a method by which digital data can be encoded on a narrow audio stream. It's basically an old-school dial-up modem.
You can create and/or interpret those audio streams on a smartphone or computer via a headphone jack to pump them to/from the radio.