Fft magnitude vs amplitude

1. What is the difference between magnitude and amplitude?
2. What does magnitude of FFT tell you?
3. Does amplitude affect FFT?
4. What is the amplitude in an FFT?

What is the difference between magnitude and amplitude?

Amplitude and magnitude are both terms used to describe properties of quantities. The main difference between amplitude and magnitude is that amplitude refers to the furthest values that a quantity can take from 0 whereas magnitude refers to the size of a quantity regardless of direction.

What does magnitude of FFT tell you?

The output of the FFT is a complex vector containing information about the frequency content of the signal. The magnitude tells you the strength of the frequency components relative to other components. The phase tells you how all the frequency components align in time.

Does amplitude affect FFT?

Such amplitudes can be pretty high and affect FFT results, (with no window function, it can be about 10% of the original values for about 10 neighbor lines). If there is another sine wave in the signal in this region, which is lower than this 10%, it will be completely hidden by the leakage effect.

What is the amplitude in an FFT?

The frequency axis is identical to that of the two-sided power spectrum. The amplitude of the FFT is related to the number of points in the time-domain signal.