Highly addictive smartphone game, playable only when the phone detects (gps, accelerometer, Bluetooth beacons) that the player is on a train/bus/tram (Working title: Pokémon Shut The **** Up). Bonus: game becomes unplayable if phone can hear that people are talking. Bonus bonus: synergistic use of conversation detection alongside Bluetooth “exposure notification“.
It's called a quiet carriage. We typically have them only on the long hauls. Covid has pretty much emptied the trains so it doesn't really matter anyway.
In general ordinance would likely work in Germany but it's not easy to define non-reasonable conversations into law. You probably want people to be able to say "We are going of that the next station".
Practically, I don't have direct input input into policy-making.
Whether masked or not masked, holding conversations seems to increase COVID-19 transmission. It's my impression that while people in Berlin generally do wear masks they still hold conversations in public similarly to how they would before COVID-19. There's no messaging to cut down unneccessary communication. I don't know what to do with this insight. Does anybody have ideas?