Graphs

Fft graph explained

Fft graph explained
  1. What does an FFT graph show?
  2. What do peaks in FFT mean?
  3. Why are FFT graphs important?

What does an FFT graph show?

Frequency-domain graphs– also called spectrum plots and Fast Fourier transform graphs (FFT graphs for short)- show which frequencies are present in a vibration during a certain period of time.

What do peaks in FFT mean?

The peaks are the frequencies at which the vibration amplitude is maximal. Here, they appear to be at about 900 Hz, and about 1200-1300 Hz.

Why are FFT graphs important?

The main advantage of an FFT is speed, which it gets by decreasing the number of calculations needed to analyze a waveform.

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