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2You’ll often see this called a “Hanning” window, however, it is named after an Austrian meteorologist named Julius von Hann, so Hann is probably more correct, in spite of common usage. The people who named the function after him were Blackman and Tukey, names that will come up in a couple of pages... Interestingly, it was Blackman and Tukey who started calling using the term “hanning” – but they used it as a verb, as in “You use a Hann window for hanning a signal.”[wik, ]