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Tag: Fourier

How to Calculate Frequencies and Amplitudes

This is what a one second sample of brainwaves looks like when graphed:one-second-graph

So based on these squiggly brainwaves, how do we calculate frequencies and amplitudes?

Luckily mathematicians have come up with a solution called “Spectrum Analysis using Fourier transform”. The basic idea is that every wave, no matter how complex and irregular, can be represented by combining a number of simple (sine and cosine) waves.