diff --git a/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C
new file mode 100644
index 0000000000..c32c4ec21d
--- /dev/null
+++ b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.C
@@ -0,0 +1,150 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "noiseModel.H"
+
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    defineTypeNameAndDebug(noiseModel, 0);
+    defineRunTimeSelectionTable(noiseModel, dictionary);
+}
+
+// * * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * //
+
+Foam::scalar Foam::noiseModel::checkUniformTimeStep
+(
+    const scalarList& times
+) const
+{
+    scalar deltaT = -1.0;
+
+    if (times.size() > 1)
+    {
+        for (label i = 1; i < times.size(); i++)
+        {
+            scalar dT = times[i] - times[i-1];
+
+            if (deltaT < 0)
+            {
+                deltaT = dT;
+            }
+
+            if (mag(deltaT - dT) > SMALL)
+            {
+                FatalErrorInFunction
+                    << "Unable to process data with a variable time step"
+                    << exit(FatalError);
+            }
+        }
+    }
+    else
+    {
+        FatalErrorInFunction
+            << "Unable to create FFT with a single value"
+            << exit(FatalError);
+    }
+
+    return deltaT;
+}
+
+
+Foam::label Foam::noiseModel::findStartTimeIndex
+(
+    const instantList& allTimes,
+    const scalar startTime
+) const
+{
+    forAll(allTimes, timeI)
+    {
+        const instant& i = allTimes[timeI];
+
+        if (i.value() >= startTime)
+        {
+            return timeI;
+        }
+    }
+
+    return 0;
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::noiseModel::noiseModel(const dictionary& dict)
+:
+    dict_(dict),
+    pRef_(dict.lookupOrDefault("pRef", 0)),
+    nSamples_(dict.lookupOrDefault("N", 65536)),
+    fLower_(dict.lookupOrDefault("fl", 25)),
+    fUpper_(dict.lookupOrDefault("fu", 10000)),
+    startTime_(dict.lookupOrDefault("startTime", 0)),
+    windowModelPtr_(windowModel::New(dict, nSamples_))
+{
+    // Check number of samples  - must be a power of 2 for our FFT
+    bool powerOf2 = ((nSamples_ != 0) && !(nSamples_ & (nSamples_ - 1)));
+    if (!powerOf2)
+    {
+        FatalIOErrorInFunction(dict)
+            << "N: Number of samples in sampling windows must be a "
+            << "power of 2"
+            << exit(FatalIOError);
+    }
+
+    if (fLower_ < 0)
+    {
+        FatalIOErrorInFunction(dict)
+            << "fl: lower frequency bound must be greater than zero"
+            << exit(FatalIOError);
+
+    }
+
+    if (fUpper_ < 0)
+    {
+        FatalIOErrorInFunction(dict)
+            << "fu: upper frequency bound must be greater than zero"
+            << exit(FatalIOError);
+
+    }
+
+    if (fUpper_ < fLower_)
+    {
+        FatalIOErrorInFunction(dict)
+            << "fu: upper frequency bound must be greater than lower "
+            << "frequency bound (fl)"
+            << exit(FatalIOError);
+
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
+
+Foam::noiseModel::~noiseModel()
+{}
+
+
+// ************************************************************************* //
diff --git a/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.H b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.H
new file mode 100644
index 0000000000..f7e739b7d0
--- /dev/null
+++ b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModel.H
@@ -0,0 +1,175 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2015-2016 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::noiseModel
+
+Description
+    Base class for noise models.
+
+    Data is read from a dictionary, e.g.
+
+    \verbatim
+    pRef            0;
+    N               4096;
+    fl              25;
+    fu              25;
+    startTime       0;
+    \endverbatim
+
+    where
+    \table
+        Property    | Description                   | Required  | Default value
+        pRef        | Reference pressure            | no        | 0
+        N           | Number of samples in sampling window | no | 65536 (2^16)
+        fl          | Lower frequency bounds        | no        | 25
+        fu          | Upper frequency bounds        | no        | 10000
+    \endtable
+
+Note
+    The number of samples in the sampling window must be a power of 2
+
+
+SourceFiles
+    noiseModel.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef noiseModel_H
+#define noiseModel_H
+
+#include "dictionary.H"
+#include "scalarList.H"
+#include "instantList.H"
+#include "windowModel.H"
+#include "runTimeSelectionTables.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                         Class noiseModel Declaration
+\*---------------------------------------------------------------------------*/
+
+class noiseModel
+{
+
+private:
+
+    // Private Member Functions
+
+        //- Disallow default bitwise copy construct
+        noiseModel(const noiseModel&);
+
+        //- Disallow default bitwise assignment
+        void operator=(const noiseModel&);
+
+
+protected:
+
+    // Protected Data
+
+        //- Copy of dictionary used for construction
+        const dictionary dict_;
+
+        //- Reference pressure
+        scalar pRef_;
+
+        //- Number of samples in sampling window, default = 2^16
+        label nSamples_;
+
+        //- Lower frequency limit, default = 25Hz
+        scalar fLower_;
+
+        //- Upper frequency limit, default = 10kHz
+        scalar fUpper_;
+
+        //- Start time, default = 0s
+        scalar startTime_;
+
+        //- Window model
+        autoPtr<windowModel> windowModelPtr_;
+        
+
+
+    // Protected Member Functions
+
+        //- Check and return uniform time step
+        scalar checkUniformTimeStep
+        (
+            const scalarList& times
+        ) const; 
+
+        //- Find and return start time index
+        label findStartTimeIndex
+        (
+            const instantList& allTimes,
+            const scalar startTime
+        ) const;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("noiseModel");
+
+    //- Run time selection table  
+    declareRunTimeSelectionTable
+    (
+        autoPtr,
+        noiseModel,
+        dictionary,
+        (
+            const dictionary& dict
+        ),
+        (dict)
+    );
+
+    //- Selector
+    static autoPtr<noiseModel> New(const dictionary& dict);
+
+    //- Constructor
+    noiseModel(const dictionary& dict);
+
+    //- Destructor
+    virtual ~noiseModel();
+
+
+    // Public Member Functions
+
+        //- Abstract call to calculate
+        virtual void calculate() = 0;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/randomProcesses/noise/noiseModels/noiseModel/noiseModelNew.C b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModelNew.C
new file mode 100644
index 0000000000..3f5fa4f25f
--- /dev/null
+++ b/src/randomProcesses/noise/noiseModels/noiseModel/noiseModelNew.C
@@ -0,0 +1,53 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "noiseModel.H"
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+Foam::autoPtr<Foam::noiseModel> Foam::noiseModel::New(const dictionary& dict)
+{
+    const word modelType(dict.lookup("noiseModel"));
+
+    Info<< "Selecting noiseModel " << modelType << endl;
+
+    dictionaryConstructorTable::iterator cstrIter =
+        dictionaryConstructorTablePtr_->find(modelType);
+
+    if (cstrIter == dictionaryConstructorTablePtr_->end())
+    {
+        FatalErrorInFunction
+            << "Unknown noiseModel type "
+            << modelType << nl << nl
+            << "Valid noiseModel types are:" << nl
+            << dictionaryConstructorTablePtr_->sortedToc()
+            << exit(FatalError);
+    }
+
+    return autoPtr<noiseModel>(cstrIter()(dict.subDict(modelType + "Coeffs")));
+}
+
+
+// ************************************************************************* //