To my understanding, the pickups are wired in a specific manner to achieve its distinctive voice, with the noise being an unavoidable consequence of that design.
They're single coils - nothing all that special about their design. A Jazz bass with one pickup soloed hums just fine, too.
The sound of a Ric is more about where the pickups are (their locations are different than where Fender put theirs) than how they're made.