Classic Blackman

The so-called ``Blackman Window'' is the specific case for which $\alpha_0 = 0.42$ $\alpha_1 = 0.5$, and $\alpha_2 = 0.08$. It has the following properties:

• Side lobes roll off at about $18\dB$ per octave (like Hann).
• Side-lobe level is about $58$ dB (worst case).
• One degree of freedom used to increase the roll-off rate from 6dB/octave (like rectangular) to 18 dB per octave by matching amplitude and slope to 0 at the window endpoints.
• One degree of freedom is used to minimize side lobes (like Hamming).
• One degree of freedom is used to scale the window.