But what is the Fourier Transform? A visual introduction.

Winding a signal and averaging in time connects time-domain waveforms with complex frequency spectra, leading to frequency separation and filtering.

Before you watch

• Basic understanding of sine waves and periodic functions
• Conceptual familiarity with adding functions pointwise
• Elementary notion of center of mass or average value
• Familiarity with Cartesian coordinates and plotting graphs
• Introductory knowledge of calculus concepts like limits and integrals