Berkeley (bärk´lê, bûrk´-), George
Irish prelate and philosopher whose basic theory, directed against the materialism of Thomas Hobbes, is that to be is to perceive or to be perceived. His works include Treatise Concerning the Principles of Human Knowledge (1710).
according to philosopher/scientist George Berkeley, our knowledge of anything is merely our sensation of it and the ideas derived from these sensations. sound is the sensation experienced through the faculty of hearing, and there is, to the trained ear, a marked difference between the silence in an empty ballroom and the silence at midnight on a lonely road.