Fast Fourier Transform (FFT)

The Fast Fourier Transform (FFT) is an efficient algorithm that converts a complex signal, like sound or light, from its original form over time into a spectrum of its component frequencies. Think of it as a way to identify all the different notes or pitches within a sound. Instead of analyzing repeated calculations, FFT quickly breaks down the signal, revealing the strength of each frequency present. This process is essential in many fields, such as audio processing, telecommunications, and image analysis, because it helps us understand and manipulate signals more effectively.