After a splendid Music Hack Day London in 2011 we were lucky to be invited to a small tour in the National Physical Laboratory of London. Ian Butterworth was so kind to show us around and illustrate the impressive effects of the acoustic chambers they use for testing.
These recordings have been sitting around on my SoundCloud account for ages and I am finally posting them here for you to enjoy. The quality is not great since I recorded these with an iPad, but you should be able to get a pretty good impression.