Interesting Music Instrument that Speaks A Lot About Society

[phaigaep]

I just watched a video about instrument that seeks to make "noise" into music. This made me think about how we define noise and how we define music. It fascinates me how sometimes we try to drown out noise with music and vice versa.

How exactly do we define noise? How exactly do we define music? And why must we seperate the two?