noiseFFT Class Reference

Performs FFT of pressure field to generate noise data. More...

Inheritance diagram for noiseFFT:

Collaboration diagram for noiseFFT:

Public Member Functions
	noiseFFT (const scalar deltaT, const label windowSize=-1)
	~noiseFFT ()
void	setData (scalarList &data)
void	setData (const fileName &pFileName, const label skip=0)
graph	pt () const
tmp< scalarField >	Pf (const tmp< scalarField > &pn) const
graph	meanPf (const windowModel &window) const
graph	RMSmeanPf (const windowModel &window) const
graph	PSDf (const windowModel &window) const
graph	PSD (const graph &gPSDf) const
graph	octaves (const graph &g, const labelUList &freqBandIDs) const
scalar	dbToPa (const scalar db) const
tmp< scalarField >	dbToPa (const tmp< scalarField > &db) const
Public Member Functions inherited from Field
constexpr	Field () noexcept
	Field (const label len)
	Field (const label len, const Type &val)
	Field (const label len, const Foam::zero)
	Field (const Foam::one, const Type &val)
	Field (const Foam::one, Type &&val)
	Field (const Foam::one, const Foam::zero)
	Field (const Field< Type > &fld)
	Field (const UList< Type > &list)
template<class Addr >
	Field (const IndirectListBase< Type, Addr > &list)
	Field (Field< Type > &&fld)
	Field (List< Type > &&list)
template<int SizeMin>
	Field (DynamicList< Type, SizeMin > &&list)
	Field (const UList< Type > &mapF, const labelUList &mapAddressing)
	Field (const tmp< Field< Type >> &tmapF, const labelUList &mapAddressing)
	Field (const UList< Type > &mapF, const labelListList &mapAddressing, const scalarListList &weights)
	Field (const tmp< Field< Type >> &tmapF, const labelListList &mapAddressing, const scalarListList &weights)
	Field (const UList< Type > &mapF, const FieldMapper &map, const bool applyFlip=true)
	Field (const UList< Type > &mapF, const FieldMapper &map, const Type &defaultValue, const bool applyFlip=true)
	Field (const UList< Type > &mapF, const FieldMapper &map, const UList< Type > &defaultValues, const bool applyFlip=true)
	Field (const tmp< Field< Type >> &tmapF, const FieldMapper &map, const bool applyFlip=true)
	Field (const tmp< Field< Type >> &tmapF, const FieldMapper &map, const Type &defaultValue, const bool applyFlip=true)
	Field (const tmp< Field< Type >> &tmapF, const FieldMapper &map, const UList< Type > &defaultValues, const bool applyFlip=true)
	Field (Field< Type > &fld, bool reuse)
	Field (const tmp< Field< Type >> &tfld)
	Field (Istream &is)
	Field (const word &keyword, const dictionary &dict, const label len)
tmp< Field< Type > >	clone () const
void	map (const UList< Type > &mapF, const labelUList &mapAddressing)
void	map (const tmp< Field< Type >> &tmapF, const labelUList &mapAddressing)
void	map (const UList< Type > &mapF, const labelListList &mapAddressing, const scalarListList &weights)
void	map (const tmp< Field< Type >> &tmapF, const labelListList &mapAddressing, const scalarListList &weights)
void	map (const UList< Type > &mapF, const FieldMapper &map, const bool applyFlip=true)
void	map (const tmp< Field< Type >> &tmapF, const FieldMapper &map, const bool applyFlip=true)
void	autoMap (const FieldMapper &map, const bool applyFlip=true)
void	rmap (const UList< Type > &mapF, const labelUList &mapAddressing)
void	rmap (const tmp< Field< Type >> &tmapF, const labelUList &mapAddressing)
void	rmap (const UList< Type > &mapF, const labelUList &mapAddressing, const UList< scalar > &weights)
void	rmap (const tmp< Field< Type >> &tmapF, const labelUList &mapAddressing, const UList< scalar > &weights)
void	negate ()
tmp< Field< cmptType > >	component (const direction) const
void	replace (const direction, const UList< cmptType > &)
void	replace (const direction, const tmp< Field< cmptType >> &)
void	replace (const direction, const cmptType &)
template<class VSForm >
VSForm	block (const label start) const
tmp< Field< Type > >	T () const
void	writeEntry (const word &keyword, Ostream &os) const
SubField< Type >	slice (const label pos, label len=-1)
const SubField< Type >	slice (const label pos, label len=-1) const
SubField< Type >	slice (const labelRange &range)
const SubField< Type >	slice (const labelRange &range) const
void	operator= (const Field< Type > &)
void	operator= (const tmp< Field< Type >> &)
void	operator= (const UList< Type > &rhs)
void	operator= (const SubField< Type > &rhs)
template<class Addr >
void	operator= (const IndirectListBase< Type, Addr > &rhs)
void	operator= (Field< Type > &&rhs)
void	operator= (List< Type > &&rhs)
template<int SizeMin>
void	operator= (DynamicList< Type, SizeMin > &&rhs)
void	operator= (const Type &val)
void	operator= (const Foam::zero)
template<class Form , class Cmpt , direction nCmpt>
void	operator= (const VectorSpace< Form, Cmpt, nCmpt > &)
void	operator+= (const UList< Type > &)
void	operator+= (const tmp< Field< Type >> &)
void	operator-= (const UList< Type > &)
void	operator-= (const tmp< Field< Type >> &)
void	operator*= (const UList< scalar > &)
void	operator*= (const tmp< Field< scalar >> &)
void	operator/= (const UList< scalar > &)
void	operator/= (const tmp< Field< scalar >> &)
void	operator+= (const Type &)
void	operator-= (const Type &)
void	operator*= (const scalar &)
void	operator/= (const scalar &)
template<class Type >
	Field (const UList< Type > &mapF, const labelUList &mapAddressing)
template<class Type >
	Field (const tmp< Field< Type >> &tmapF, const labelUList &mapAddressing)
template<class Type >
	Field (const UList< Type > &mapF, const labelListList &mapAddressing, const scalarListList &mapWeights)
template<class Type >
	Field (const tmp< Field< Type >> &tmapF, const labelListList &mapAddressing, const scalarListList &mapWeights)
template<class Type >
	Field (const UList< Type > &mapF, const FieldMapper &mapper, const bool applyFlip)
template<class Type >
	Field (const UList< Type > &mapF, const FieldMapper &mapper, const Type &defaultValue, const bool applyFlip)
template<class Type >
	Field (const UList< Type > &mapF, const FieldMapper &mapper, const UList< Type > &defaultValues, const bool applyFlip)
template<class Type >
	Field (const tmp< Field< Type >> &tmapF, const FieldMapper &mapper, const bool applyFlip)
template<class Type >
	Field (const tmp< Field< Type >> &tmapF, const FieldMapper &mapper, const Type &defaultValue, const bool applyFlip)
template<class Type >
	Field (const tmp< Field< Type >> &tmapF, const FieldMapper &mapper, const UList< Type > &defaultValues, const bool applyFlip)
template<class Type >
	Field (const word &keyword, const dictionary &dict, const label len)
template<class Type >
void	operator= (const Field< Type > &rhs)
template<class Type >
void	operator= (const tmp< Field > &rhs)
template<class Type >
constexpr	Field () noexcept
template<class Type >
	Field (const label len)
template<class Type >
	Field (const label len, const Type &val)
template<class Type >
	Field (const label len, const Foam::zero)
template<class Type >
	Field (const Foam::one, const Type &val)
template<class Type >
	Field (const Foam::one, Type &&val)
template<class Type >
	Field (const Foam::one, const Foam::zero)
template<class Type >
	Field (const Field< Type > &fld)
template<class Type >
	Field (const UList< Type > &list)
template<class Type >
	Field (Field< Type > &&fld)
template<class Type >
	Field (List< Type > &&list)
template<class Type >
	Field (Field< Type > &fld, bool reuse)
template<class Type >
	Field (const tmp< Field< Type >> &tfld)
template<class Type >
	Field (Istream &is)
template<class Type >
void	operator= (const UList< Type > &rhs)
template<class Type >
void	operator= (const SubField< Type > &rhs)
template<class Type >
void	operator= (Field< Type > &&rhs)
template<class Type >
void	operator= (List< Type > &&rhs)
template<class Type >
void	operator= (const Type &val)
template<class Type >
void	operator= (const Foam::zero)

Static Public Member Functions
static tmp< scalarField >	frequencies (const label N, const scalar deltaT)
static tmp< scalarField >	PSD (const scalarField &PSDf)
static tmp< scalarField >	SPL (const scalarField &Prms2)
static void	octaveBandInfo (const scalarField &f, const scalar fLower, const scalar fUpper, const scalar octave, labelList &fBandIDs, scalarField &fCentre)
Static Public Member Functions inherited from Field
static const Field< Type > &	null ()
static autoPtr< Field< Type > >	New (Istream &is)
template<class Type2 >
static tmp< Field< Type > >	NewCalculatedType (const Field< Type2 > &f)

Static Public Attributes
static scalar	p0 = 2e-5

Additional Inherited Members
Public Types inherited from Field
typedef pTraits< Type >::cmptType	cmptType
typedef SubField< Type >	subField

Detailed Description

Performs FFT of pressure field to generate noise data.

General functionality:

• Pf: fft of the pressure data
• meanPf: multi-window mean fft
• RMSmeanPf: multi-window RMS mean fft
• PSDf: multi-window power spectral density (PSD) in frequency domain
• PSD: power spectral density in dB/Hz
• SPL: sound pressure level in dB

Octave-based data:

• PSD spectrum
• SPL spectrum

Source files

• noiseFFT.H
• noiseFFT.C

See also

windowModel.H

Definition at line 65 of file noiseFFT.H.

Constructor & Destructor Documentation

noiseFFT()

noiseFFT	(	const scalar	deltaT,
		const label	windowSize = -1
	)

Definition at line 137 of file noiseFFT.C.

~noiseFFT()

~noiseFFT

(

)

Definition at line 169 of file noiseFFT.C.

Member Function Documentation

frequencies()

Foam::tmp< Foam::scalarField > frequencies ( const label  N, const scalar  deltaT  )

static

Definition at line 37 of file noiseFFT.C.

References f(), forAll, N(), tmp::New(), and Foam::Zero.

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PSD() [1/2]

Foam::tmp< Foam::scalarField > PSD ( const scalarField &  PSDf )

static

Definition at line 55 of file noiseFFT.C.

References Foam::log10(), p0, and Foam::sqr().

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SPL()

Foam::tmp< Foam::scalarField > SPL ( const scalarField &  Prms2 )

static

Definition at line 61 of file noiseFFT.C.

References Foam::log10(), p0, and Foam::sqr().

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octaveBandInfo()

void octaveBandInfo ( const scalarField &  f, const scalar  fLower, const scalar  fUpper, const scalar  octave, labelList &  fBandIDs, scalarField &  fCentre  )

static

Definition at line 68 of file noiseFFT.C.

References DynamicList::append(), f(), forAll, HashSet::insert(), Foam::pow(), and DynamicList::remove().

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setData() [1/2]

void setData

(

scalarList &

data

)

Definition at line 182 of file noiseFFT.C.

References Foam::average(), and p.

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setData() [2/2]

void setData	(	const fileName &	pFileName,
		const label	skip = 0
	)

Definition at line 191 of file noiseFFT.C.

References Foam::average(), IOstream::eof(), Foam::exit(), Foam::FatalError, FatalErrorInFunction, IOstream::good(), p, and T0.

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pt()

Foam::graph pt

(

)

const

Definition at line 249 of file noiseFFT.C.

References forAll.

Pf()

Foam::tmp< Foam::scalarField > Pf

(

const tmp< scalarField > &

pn

)

const

Definition at line 269 of file noiseFFT.C.

References Foam::abort(), tmp::clear(), Foam::FatalError, FatalErrorInFunction, forAll, Foam::mag(), n, tmp::New(), Foam::constant::atomic::re, fft::realTransform1D(), and Foam::sqrt().

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meanPf()

Foam::graph meanPf

(

const windowModel &

window

)

const

Definition at line 316 of file noiseFFT.C.

References windowModel::apply(), f(), forAll, N(), windowModel::nSamples(), windowModel::nWindow(), and Foam::Zero.

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RMSmeanPf()

Foam::graph RMSmeanPf

(

const windowModel &

window

)

const

Definition at line 348 of file noiseFFT.C.

References windowModel::apply(), f(), forAll, N(), windowModel::nSamples(), windowModel::nWindow(), Foam::sqr(), Foam::sqrt(), and Foam::Zero.

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PSDf()

Foam::graph PSDf

(

const windowModel &

window

)

const

Definition at line 379 of file noiseFFT.C.

References windowModel::apply(), Foam::average(), Foam::endl(), f(), forAll, N(), windowModel::nSamples(), windowModel::nWindow(), Foam::Pout, Foam::sqr(), and Foam::Zero.

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PSD() [2/2]

Foam::graph PSD

(

const graph &

gPSDf

)

const

Definition at line 424 of file noiseFFT.C.

References Foam::log10(), p0, Foam::sqr(), graph::x(), and graph::y().

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octaves()

Foam::graph octaves	(	const graph &	g,
		const labelUList &	freqBandIDs
	)		const

Definition at line 438 of file noiseFFT.C.

References Foam::endl(), f(), g, UList::size(), WarningInFunction, and Foam::Zero.

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dbToPa() [1/2]

Foam::scalar dbToPa

(

const scalar

db

)

const

Definition at line 494 of file noiseFFT.C.

References p0, and Foam::pow().

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dbToPa() [2/2]

Foam::tmp< Foam::scalarField > dbToPa

(

const tmp< scalarField > &

db

)

const

Definition at line 501 of file noiseFFT.C.

References p0, and Foam::pow().

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Member Data Documentation

p0

Foam::scalar p0 = 2e-5

static

Definition at line 105 of file noiseFFT.H.

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The documentation for this class was generated from the following files:

• src/randomProcesses/noise/noiseFFT/noiseFFT.H
• src/randomProcesses/noise/noiseFFT/noiseFFT.C