This lecture will look at change ringing, which is ringing a series of tuned bells (as you might find in the bell tower of a church) in a particular sequence, and this has exciting mathematical properties. 
We will also ask: why are bells bell-shaped? What properties of this shape create the sound of a bell, and by what amount should we scale the size of a bell to produce changes in pitch?
A lecture by Sarah Hart 5 January
The transcript and downloadable versions of the lecture are available from the Gresham College website: 
https://www.gresham.ac.uk/lectures-and-events/maths-bellringing
Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 2,000 lectures free to access or download from the website.
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