How to understand FFT results of scipy.fftpack?

1. What are the outputs of FFT?
2. What do FFT values mean?
3. What is SciPy fftpack in Python?

What are the outputs of FFT?

These frequencies actually represent the frequencies of the two sine waves which generated the signal. The output of the Fourier transform is nothing more than a frequency domain view of the original time domain signal.

What do FFT values mean?

The "Fast Fourier Transform" (FFT) is an important measurement method in the science of audio and acoustics measurement. It converts a signal into individual spectral components and thereby provides frequency information about the signal.

What is SciPy fftpack in Python?

SciPy offers the fftpack module, which lets the user compute fast Fourier transforms. Following is an example of a sine function, which will be used to calculate Fourier transform using the fftpack module.