If it is silence people prefer in freewheels, my idea is that nothing is quieter than a good old Fichtel & Sachs Torpedo single speed coaster
hub.
It even came in a "Renntorpedo" (racing Torpedo) version, slightly narrower than the standard one, to accomodate up to five, more commonly
three, cogs for a derailleur. No pawls, no clicking, because it employs
the famous roller clutch system which was copied world wide, and not only in bikes, but also in car hub freewheels (DKW) and automatic winding watch mechanisms (Girard-Perregaux Gyromatic, some Soviet calibers).
For all those single-speed afficionados the standard version will do and certainly is to be found easily even now (which can´t be said of
the Renntorpedo).
It would be a real challenge to make the Torpedo lose weight from about
two pounds to something more acceptable by machining a light alloy shell with steel liners for clutch and braking surfaces.
Regards, Toni Theilmeier, Belm, Germany, who uses a Torpedo regularly
in his Post Office carrier bike to lug home the shopping.
P.S.: Still using analog dial-up internet, so please don´t send photos
or scans.