This series of videos are based on the series of drawings "Cities", abstract piles that grow and decrease rhythmically.
The silence in contrast to the noise of the city, I refer to the reason given by John Cage, with respect to the reduced listening of "noise", at the beginning of his book Silence (1961, p. 3): "When we ignore it, it disturb us. When we listen to it, we find it fascinating. "(When we ignore it, it bothers us.) When we listen to it, we find it fascinating.
That phrase sums everything up, when one stops to "listen" to previously imperceptible sounds and moves away from the source that generates it, discovers its qualities and can enjoy its speech as when we listen to a melody.