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SignalUtils.KaiserBetaWindowAtt Function
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Returns beta parameter for frequency analysis with the Kaiser window.

Pascal
function KaiserBetaWindowAtt(Att: double): double; overload;
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Description

Compute Beta parameter for the Kaiser window applied to the signal, where spectral leakage is attenuated at least Att decibels. Attenuation is estimated from ripple as: 

 

Att[dB] = -20*Log10(Ripple);

Ripple = Exp10(Att/-20);
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