Vibrations and how they get to your ears.
Noise for airports is a blog about culture, sound, music, and technology.
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Updated (sometimes) by Nick Seaver.

If you’ve ever used Shazam on the iPhone and wondered how it works, there is an article on Slate for you!
The article itself isn’t too explanatory, but luckily it links to both another blog post with a more detailed description of how the Shazam ID system works and a PDF of the paper written by the inventor to describe it!
edit to add: Shazam is that thing that lets you record a song that’s playing and then tells you what it is. Totally magic. Once IDed a Lindsay Lohan song playing in the background of a noisy seaside clam shack for me.
(via Slate Magazine)