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Plus Advent Calendar Door #5: Catching waves

A CAT scan of the inside of a head.

A CAT scan of the inside of a head.

"Deck the halls with boughs of holly, fa, la, la, la, la, la, la, la, la!" Are you loving the ubiquitous Christmas carols? A piece of mathematics is to thank for the online availability of carols, and any other music you can think of.

Digital music and images would be impossible without Fourier transforms and it has applications in anything from medical imaging to landmine detection. In this interview from 2008 we asked Chris Budd what the Fourier transform does, and how it does it. This podcast accompanies the Plus article Saving lives: The mathematics of tomography.

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You can listen to the podcast using the player above, and you can listen and subscribe to our podcast through Apple Podcasts, Spotify and through most other podcast providers via podbean.

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  • Want facts and want them fast? Our Maths in a minute series explores key mathematical concepts in just a few words.