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.

This article on BBC News describes a “micro-ear” technology developed to listen to microscopic organisms. By using tiny (like two microns across) beads and lasers, the scientists can measure very small vibrations and amplify them.
(via @bldgblog)