ENH: Added new noise utility to generate FFT metrics from pressure data

applications/utilities/postProcessing/noise/createFields.H

@@ -0,0 +1,34 @@
+    word dictName("noiseDict");
+    if (args.optionFound("dict"))
+    {
+        dictName = args["dict"];
+    }
+
+    IOdictionary dict
+    (
+        IOobject
+        (
+            dictName,
+            runTime.system(),
+            runTime,
+            IOobject::MUST_READ
+        )
+    );
+
+    // reference pressure
+    scalar pRef = dict.lookupOrDefault("pRef", 0.0);
+
+    // number of samples in sampling window
+    label N = dict.lookupOrDefault("N", 65536);
+
+    // number of sampling windows
+    label nw = dict.lookupOrDefault("nw", 100);
+
+    // lower frequency of frequency band
+    scalar f1 = dict.lookupOrDefault("f1", 25.0);
+
+    // upper frequency of frequency band
+    scalar fU = dict.lookupOrDefault("fU", 10000.0);
+
+    // graph format
+    word graphFormat = dict.lookupOrDefault<word>("graphFormat", "raw");