While it's certainly one of the most recognizable pieces in the series (mind you it's only recognizable because it became ubiquitous later), can just 2 notes even be copywrighted? I mean we're not talking about a Brian Eno piece here.
"White noise" is just the title/label of the blog post. No doubt chosen for poetic purposes. Note the OTHER blog entry titles, listed on the right hand column.
"White noise" is not just the title of the post, it is also a link to a page where you can play an audio snippet of the coin noise.