# Fourier Analysis and its applications [duplicate]

My question has two parts:

$1)$ Could anyone explain in simple terms what a Fourier Transform is?

$2)$ What are some of the applications of Fourier Analysis in the field of high school mathematics?

• Re 2), the Fourier transform is a mathematical way to express the spectrum of a signal such as an audio signal -- think of the use of an equalizer for example. If high school physics includes spectra, then ideally high school calculus would complement it by giving the relevant math, but that seems a bit difficult in practice. – ForgotALot Apr 2 '16 at 7:09
• – Watson Dec 4 '16 at 12:59