Merriam-Webster defines music as the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuity.
However, does noise fall into this category? Can it be neatly combined and ordered to produce a composition? The Italian Futurists seemed to think so in the early 20th Century. However, their audiences were horrified. Turns out the Futurists may have been almost a century ahead of their time.
PBS Idea Channel makes the argument that dubstep, an electronic sub-genre dependent on noise, is the perfect example of the concept of noise as music.