I am hard wired to the internet 24/365. No matter where in the world I go, there are very few places to escape even satelites these days.
I don't watch a lot of TV though.
I guess my 'quiet time' is scheduled with SKA Kata, Tai Chi, and those times with my partner when I deliberately unplug.
I'm not sure it is possible to consciously filter all the sounds and images that come at us today; I think its just sort of hierarchal concentration on the stuff we need at the moment.
I do worry though that as we are absorbed with more and more information overload and technology brings us even more ways to isolate ourselves in entertainment, that we lose our basic social developement and skills - we draw away from each other and don't form tha tight communities that our ancestors did.