File:Hall2006 Sinc function.png

Summary
Leakage. (a) A relatively long-lived signal and (b) its spectrum. (c) The same signal, windowed with a boxcar function (shown) and (d) its spectrum, showing sidelobes and increased peak width. (e) The same signal, windowed with a Hann function (shown) and (f) its spectrum, showing no sidelobes but an even wider peak.