Classic Blackman

The so-called ``Blackman Window'' is the specific case for which , and . It has the following properties:

• Side lobes roll off at about per octave (like Hann).
• Side-lobe level is about 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.

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written by Julius Orion Smith III
Julius Smith's background is in electrical engineering (BS Rice 1975, PhD Stanford 1983). He is presently Professor of Music and Associate Professor (by courtesy) of Electrical Engineering at Stanford's Center for Computer Research in Music and Acoustics (CCRMA), teaching courses and pursuing research related to signal processing applied to music and audio systems. See http://ccrma.stanford.edu/~jos/ for details.