Every pure musical tone has a frequency, the number of oscillations per second in the sound wave. Doubling the frequency corresponds to moving up one octave. A musical note consists of a base frequency or pitch, called the *fundamental* together with a series of *harmonics*, or oscillations whose frequencies are whole-number multiples of the fundamental frequency.

## Archive for August, 2014

Mathematics is coming to Life in a Big Way. This week’s *That’s Maths* in *The Irish Times* (TM051, or Search for “thatsmaths” at irishtimes.com) is about the increasing importance of mathematics in the biological sciences.

Do you recall coming across those diagrams with overlapping circles that were popularised in the ‘sixties’, in conjunction with the “New Maths”. They were originally introduced around 1880 by John Venn, and now bear his name.

Continue reading ‘Do you remember Venn?’*That’s Maths* in *The Irish Times* this week (TM050, or Search for “thatsmaths” at irishtimes.com) is about how a simple pendulum can demonstrate the rotation of the Earth.