MIST SIGNALS

"Signals do not convey information as railway trains carry coal.  Rather we should say: signals have an information content by virtue of their potential for making selections.  Signals operate upon the alternatives forming the recipients' doubt.  They give power to discriminate amongst or select from alternatives."

Sir Colin Cherry, On The Statistical Theory of Communication. 

Wreckless Eric: Semaphore Signals (Link)

Kinks: Misty Water (Link) 

The Cocktail Party Problem (Link)