Conduit

"[Radio] is nothing but a conduit through which prefabricated din can flow into our homes. And this din goes far deeper, of course, than the eardrums; it penetrates the mind, filling it with a babble of distractions -- news items, mutually irrelevant bits of information, blasts of corybantic or sentimental music, continually repeated doses of drama that bring no catharsis, but merely create a craving for daily or even hourly emotional enemas."
--Aldous Huxley