A classical thought of sound can not be the same when our present world is absolutely crossed and occupied, unprecedentedly, by sounds. In this way, the present book intends to carry out a philosophical exercise based on the restlessness that arises from the experience of this current sound life. This exercise links the sounds to an event thought totally independent of anything. Take as a permanent example the proposals of John Cage, who always wanted to listen or ear to the sound activity, knowing that in no case listening was to appropriate the sounds or appropriate with the sounds. There is, strictly speaking, no ownership, appropriation, disappropriation of the sounds: pure freedom from happening, pure freedom from the listening experience. At least, that is the horizon, the silence.