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.

Check out this application of felt for sound attenuation in the LA Museum of Tolerance. Pretty stylish-looking, although a full-on anechoic setup would look cool too. (also, it appears that the google image search for “anechoic chamber” has recently gotten a lot cooler)
(via Dailytonic)