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DataPRO/FftSharp/Windows/Hanning.cs

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+using System;
+
+namespace FftSharp.Windows
+{
+    public class Hanning : Window, IWindow
+    {
+        public override string Name => "Hanning";
+        public override string Description =>
+            "The Hanning window has a sinusoidal shape which touches zero at the edges (unlike the similar Hamming window). " +
+            "It has good frequency resolution, low spectral leakage, and is satisfactory for 95 percent of use cases. " +
+            "If you do not know the nature of the signal but you want to apply a smoothing window, start with the Hann window.";
+
+        protected override double windowValue(int index, int size)
+        {
+            return 0.5 - 0.5 * Math.Cos(2 * Math.PI * index / size);
+        }
+    }
+}