In 1951, Cage visited the anechoic chamber at Harvard University. An anechoic chamber is a room designed in such a way that the walls, ceiling and floor absorb all sounds made in the room, rather than reflecting them as echoes. Such a chamber is also externally sound-proofed. Cage entered the chamber expecting to hear silence, but he wrote later, "I heard two sounds, one high and one low. When I described them to the engineer in charge, he informed me that the high one was my nervous system in operation, the low one my blood in circulation."Cage had gone to a place where he expected total silence, and yet heard sound. "Until I die there will be sounds. And they will continue following my death. One need not fear about the future of music."The realization as he saw it of the impossibility of silence led to the composition of 4′33″.

The Impossibility of complete silence is  an interesting aspect too. Even if you are trying to work with silence, you have to consider that fact that it is actually impossible because your body itself make sounds. For example if you are grasped with mortal fear the loudest sound that you hear is your heartbeat. And any where you go songs always surround you, but as we are used to them we don't pay attention to them. It is not disturbing at all. That means that the absolute silence is actually something abnormal.

 

 

 

 

 

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