So I'm studying data acquisition and on the lab had to perform an experiment involving sampling a sinusoidal signal of frequency 1100 Hz, 70 samples and sampling frequency 22000 Hz.
Now I can clearly see that I'll have spectral leakage in this case because 1100/(22000/70) is not a natural number. Nevertheless I was able to compute a frequency of 1173 .69 Hz which corresponds to an error of 6.67% using weighed frequency method. I think this a pretty decent result. What is intriguing me is the total harmonic distortion which is evaluated at -14.75 dB. Is this a low value? What exactly is THD measuring here? Can someone help interpret the THD meaning? Thank you!