Steam? there's posh.
Ours run on crystals :-)
We have wall-to-wall Radio4/World Service 24/7 but I can't remember hearing door bells even on the Archers. Spouse is always confused when he hears a telephone on radio and rushes to the nearest handset (one in every room) whereas I always know that it's broadcast. The phones are nowhere near the radios and the noise is directional. No wrap-round sound for us :-) Come to that, there are no radios near the front or back doors either.
Mary