Show drum signaling the smithsonian Smiths onlan institution cays in the eastern belgian kongo tribes particularly the babela have evolved a system of telegraphy through use of a wooden drum the system of signals approaching that of a C code ode the d drum rum v vibrations I 1 bra eions a are r e not articulated as in human speech rather the message Is recognized through intensity of volume rhythm kind of drum used time of day etc in a j aigle environment much anfor matlon mation may thus be signaled |