== ventana HANNING, k=1.5bins https://en.wikipedia.org/wiki/Spectral_leakage
== fs=24000;Nfft=512;hann=1.5;RBW=hann*fs/Nfft,bps=50,ratio=RBW/bps RBW = 70.312 bps = 50 ratio = 1.4062 VBW = no
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==
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