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

#include <noiseFFT.H>

Inheritance diagram for noiseFFT:

Collaboration diagram for noiseFFT:

Public Member Functions
	noiseFFT (const scalar deltaT, const label windowSize=-1)
	Construct from pressure field.
	~noiseFFT ()
	Destructor. Cleanup/destroy plan.
void	setData (scalarList &data)
	Set the pressure data.
void	setData (const fileName &pFileName, const label skip=0)
	Set the pressure data by reading from file with an optional offset.
graph	pt () const
	Return the graph of pressure as a function of time.
tmp< scalarField >	Pf (const tmp< scalarField > &pn) const
	Return the fft of the given pressure data.
graph	meanPf (const windowModel &window) const
	Return the multi-window mean fft of the complete pressure data [Pa].
graph	RMSmeanPf (const windowModel &window) const
	Return the multi-window RMS mean fft of the complete pressure.
graph	PSDf (const windowModel &window) const
	Return the multi-window PSD (power spectral density) of the complete.
graph	PSD (const graph &gPSDf) const
	Return the PSD [dB/Hz].
graph	octaves (const graph &g, const labelUList &freqBandIDs) const
	Generate octave data.
scalar	dbToPa (const scalar db) const
	Convert the db into Pa.
tmp< scalarField >	dbToPa (const tmp< scalarField > &db) const
	Convert the db-field into Pa.
Public Member Functions inherited from Field< scalar >
constexpr	Field () noexcept
	Default construct.
	Field (const label len)
	Construct given size.
	Field (const label len, const scalar &val)
	Construct given size and initial value.
	Field (const label len, Foam::zero)
	Construct given size and initial values of zero.
	Field (Foam::one, const scalar &val)
	Construct with length=1, copying the value as the only content.
	Field (Foam::one, scalar &&val)
	Construct with length=1, moving the value as the only content.
	Field (Foam::one, Foam::zero)
	Construct with length=1, initializing content to zero.
	Field (const Field< scalar > &fld)
	Copy construct.
	Field (const UList< scalar > &list)
	Copy construct from UList<Type>.
	Field (const IndirectListBase< scalar, Addr > &list)
	Copy construct from IndirectList.
	Field (Field< scalar > &&fld) noexcept
	Move construct from Field.
	Field (List< scalar > &&list) noexcept
	Move construct from List.
	Field (DynamicList< scalar, SizeMin > &&list)
	Move construct from DynamicList.
	Field (const UList< scalar > &mapF, const labelUList &mapAddressing)
	Construct by 1 to 1 mapping from the given field.
	Field (const tmp< Field< scalar > > &tmapF, const labelUList &mapAddressing)
	Construct by 1 to 1 mapping from the given tmp field.
	Field (const UList< scalar > &mapF, const labelListList &mapAddressing, const scalarListList &weights)
	Construct by interpolative mapping from the given field.
	Field (const tmp< Field< scalar > > &tmapF, const labelListList &mapAddressing, const scalarListList &weights)
	Construct by interpolative mapping from the given tmp field.
	Field (const UList< scalar > &mapF, const FieldMapper &map, const bool applyFlip=true)
	Construct by mapping from the given field.
	Field (const UList< scalar > &mapF, const FieldMapper &map, const scalar &defaultValue, const bool applyFlip=true)
	Construct by mapping from the given field.
	Field (const UList< scalar > &mapF, const FieldMapper &map, const UList< scalar > &defaultValues, const bool applyFlip=true)
	Construct by mapping from the given field.
	Field (const tmp< Field< scalar > > &tmapF, const FieldMapper &map, const bool applyFlip=true)
	Construct by mapping from the given tmp field.
	Field (const tmp< Field< scalar > > &tmapF, const FieldMapper &map, const scalar &defaultValue, const bool applyFlip=true)
	Construct by mapping from the given tmp field. Uses supplied uniform value for unmapped items.
	Field (const tmp< Field< scalar > > &tmapF, const FieldMapper &map, const UList< scalar > &defaultValues, const bool applyFlip=true)
	Construct by mapping from the given tmp field. Uses supplied values for unmapped items.
	Field (Field< scalar > &fld, bool reuse)
	Copy construct or re-use as specified.
	Field (const tmp< Field< scalar > > &tfld)
	Copy or move construct from tmp.
	Field (Istream &is)
	Construct from Istream.
	Field (const entry &e, const label len)
	Construct from a dictionary (primitive) entry.
	Field (const word &key, const dictionary &dict, const label len, IOobjectOption::readOption readOpt=IOobjectOption::MUST_READ)
	Lookup of a primitive dictionary entry by (literal) name and assign its contents to this. The behaviour largely as described in assign():
tmp< Field< scalar > >	clone () const
	Clone.
void	assign (const entry &e, const label len)
	Assign from a primitive dictionary entry with the following behaviour:
bool	assign (const word &key, const dictionary &dict, const label len, IOobjectOption::readOption readOpt=IOobjectOption::MUST_READ)
	Lookup a primitive dictionary entry by (literal) name and assign its contents to this (behaviour as described above).
void	map (const UList< scalar > &mapF, const labelUList &mapAddressing)
	1 to 1 map from the given field
void	map (const tmp< Field< scalar > > &tmapF, const labelUList &mapAddressing)
	1 to 1 map from the given tmp field
void	map (const UList< scalar > &mapF, const labelListList &mapAddressing, const scalarListList &weights)
	Interpolative map from the given field.
void	map (const tmp< Field< scalar > > &tmapF, const labelListList &mapAddressing, const scalarListList &weights)
	Interpolative map from the given tmp field.
void	map (const UList< scalar > &mapF, const FieldMapper &map, const bool applyFlip=true)
	Map from the given field.
void	map (const tmp< Field< scalar > > &tmapF, const FieldMapper &map, const bool applyFlip=true)
	Map from the given tmp field.
void	autoMap (const FieldMapper &map, const bool applyFlip=true)
	Map from self.
void	rmap (const UList< scalar > &mapF, const labelUList &mapAddressing)
	1 to 1 reverse-map from the given field
void	rmap (const tmp< Field< scalar > > &tmapF, const labelUList &mapAddressing)
	1 to 1 reverse-map from the given tmp field
void	rmap (const UList< scalar > &mapF, const labelUList &mapAddressing, const UList< scalar > &weights)
	Interpolative reverse map from the given field.
void	rmap (const tmp< Field< scalar > > &tmapF, const labelUList &mapAddressing, const UList< scalar > &weights)
	Interpolative reverse map from the given tmp field.
void	negate ()
	Inplace negate this field (negative).
void	normalise ()
	Inplace normalise this field. Generally a no-op except for vector fields.
tmp< Field< cmptType > >	component (const direction) const
	Return a component field of the field.
void	replace (const direction, const UList< cmptType > &)
	Replace a component field of the field.
void	replace (const direction, const tmp< Field< cmptType > > &)
	Replace a component field of the field.
void	replace (const direction, const cmptType &)
	Replace a component field of the field.
void	clamp_min (const scalar &lower)
	Impose lower (floor) clamp on the field values (in-place).
void	clamp_min (const UList< scalar > &lower)
	Impose lower (floor) clamp on the field values (in-place).
void	clamp_max (const scalar &upper)
	Impose upper (ceiling) clamp on the field values (in-place).
void	clamp_max (const UList< scalar > &upper)
	Impose upper (ceiling) clamp on the field values (in-place).
void	clamp_range (const scalar &lower, const scalar &upper)
	Clamp field values (in-place) to the specified range.
void	clamp_range (const MinMax< scalar > &range)
	Clamp field values (in-place) to the specified range.
VSForm	block (const label start) const
tmp< Field< scalar > >	T () const
	Return the field transpose (only defined for second rank tensors).
void	writeEntry (const word &keyword, Ostream &os) const
	Write the field as a dictionary entry.
SubField< scalar >	slice (const label pos, label len=-1)
	Return SubField slice (non-const access) - no range checking.
const SubField< scalar >	slice (const label pos, label len=-1) const
	Return SubField slice (const access) - no range checking.
SubField< scalar >	slice (const labelRange &range)
	Return SubField slice (non-const access) - with range checking.
const SubField< scalar >	slice (const labelRange &range) const
	Return SubField slice (const access) - with range checking.
void	operator= (const Field< scalar > &)
	Copy assignment.
void	operator= (const tmp< Field< scalar > > &)
void	operator= (const UList< scalar > &rhs)
void	operator= (const SubField< scalar > &rhs)
void	operator= (const IndirectListBase< scalar, Addr > &rhs)
	Copy assign from IndirectList.
void	operator= (Field< scalar > &&rhs)
	Move assignment.
void	operator= (List< scalar > &&rhs)
void	operator= (DynamicList< scalar, SizeMin > &&rhs)
void	operator= (const scalar &val)
	Assign entries to the given value.
void	operator= (Foam::zero)
	Assign entries to zero.
void	operator= (const VectorSpace< Form, Cmpt, nCmpt > &)
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 UList< scalar > &)
void	operator*= (const tmp< Field< scalar > > &)
void	operator/= (const UList< scalar > &)
void	operator/= (const tmp< Field< scalar > > &)
void	operator+= (const scalar &)
void	operator-= (const scalar &)
void	operator*= (const scalar &)
void	operator/= (const scalar &)
	Field (const Expression::ListExpression< E > &expr)
	Construct from value expression.
void	operator= (const Expression::ListExpression< E > &expr)
	Assign values from expression.
void	operator= (const tmp< Field > &rhs)
void	normalise ()
void	normalise ()
void	normalise ()
	Inplace normalise (float) vector field.
void	normalise ()
	Inplace normalise (double) vector field.
Public Member Functions inherited from FieldBase
constexpr	FieldBase () noexcept
	Default construct.
Public Member Functions inherited from refCount
constexpr	refCount () noexcept
	Default construct, initializing count to 0.
int	use_count () const noexcept
	Return the current reference count.
bool	unique () const noexcept
	Return true if the reference count is zero.
void	operator++ () noexcept
	Increment the reference count.
void	operator++ (int) noexcept
	Increment the reference count.
void	operator-- () noexcept
	Decrement the reference count.
void	operator-- (int) noexcept
	Decrement the reference count.
Public Member Functions inherited from List< scalar >
constexpr	List () noexcept
	Default construct.
	List (const label len)
	Construct with given size.
	List (const label len, const scalar &val)
	Construct with given size and value for all elements.
	List (const label len, Foam::zero)
	Construct with given size initializing all elements to zero.
	List (Foam::one, const scalar &val)
	Construct with length=1, copying the value as the only content.
	List (Foam::one, scalar &&val)
	Construct with length=1, moving the value as the only content.
	List (Foam::one, Foam::zero)
	Construct with length=1, initializing content to zero.
	List (const List< scalar > &list)
	Copy construct from list.
	List (const UList< scalar > &list)
	Copy construct contents from list.
	List (List< scalar > &list, bool reuse)
	Construct as copy or re-use as specified.
	List (const UList< scalar > &list, const labelUList &indices)
	Copy construct subset of list.
	List (const UList< scalar > &list, const FixedList< label, N > &indices)
	Copy construct subset of list.
	List (const FixedList< scalar, N > &list)
	Construct as copy of FixedList<T, N>.
	List (const UPtrList< scalar > &list)
	Construct as copy of UPtrList<T> content.
	List (const IndirectListBase< scalar, Addr > &list)
	Construct as copy of IndirectList contents.
	List (std::initializer_list< scalar > list)
	Construct from an initializer list.
	List (List< scalar > &&list) noexcept
	Move construct from List.
	List (DynamicList< scalar, SizeMin > &&list)
	Move construct from DynamicList.
	List (Istream &is)
	Construct from Istream.
autoPtr< List< scalar > >	clone () const
	Clone.
	~List ()
	Destructor.
void	clear ()
	Clear the list, i.e. set size to zero.
void	resize (const label len)
	Adjust allocated size of list.
void	resize (const label len, const scalar &val)
	Adjust allocated size of list and set val for new elements.
void	resize_copy (label count, const label len)
	Change allocated size of list, retaining the first count elements.
void	resize_fill (const label len, const scalar &val)
	Adjust allocated size of list and set val for all elements.
void	resize_nocopy (const label len)
	Adjust allocated size of list without necessarily.
void	transfer (List< scalar > &list)
	Transfer the contents of the argument List into this list and annul the argument list.
void	transfer (DynamicList< scalar, SizeMin > &list)
	Transfer the contents of the argument List into this list and annul the argument list.
scalar &	newElmt (const label i)
	Return subscript-checked element of UList and resizing the list if required.
scalar &	emplace_back (Args &&... args)
	Construct an element at the end of the list, return reference to the new list element.
void	push_back (const scalar &val)
	Append an element at the end of the list.
void	push_back (scalar &&val)
	Move append an element at the end of the list.
void	push_back (const UList< scalar > &list)
	Append a List to the end of this list.
void	push_back (const IndirectListBase< scalar, Addr > &list)
	Append IndirectList contents at the end of this list.
label	push_uniq (const scalar &val)
	Append an element if not already in the list.
void	pop_back (label n=1)
	Reduce size by 1 or more elements. Can be called on an empty list.
void	operator= (const UList< scalar > &list)
	Assignment to UList operator. Takes linear time.
void	operator= (const List< scalar > &list)
	Assignment operator. Takes linear time.
void	operator= (const IndirectListBase< scalar, Addr > &list)
	Assignment from IndirectList. Takes linear time.
void	operator= (const FixedList< scalar, N > &list)
	Copy assignment from FixedList.
void	operator= (std::initializer_list< scalar > list)
	Assignment to an initializer list.
void	operator= (const scalar &val)
	Assignment of all entries to the given value.
void	operator= (Foam::zero)
	Assignment of all entries to zero.
void	operator= (List< scalar > &&list)
	Move assignment. Takes constant time.
void	operator= (DynamicList< scalar, SizeMin > &&list)
	Move assignment. Takes constant time.
Istream &	readList (Istream &is)
	Read List from Istream, discarding contents of existing List.
void	shallowCopy (const UList< scalar > &)=delete
	No shallowCopy permitted.
bool	set (const label i, bool val=true)
	A bitSet::set() method for a list of bool.
void	append (const scalar &val)
	Append an element at the end of the list.
void	append (scalar &&val)
	Move append an element at the end of the list.
void	append (const UList< scalar > &list)
	Append a List to the end of this list.
void	append (const IndirectListBase< scalar, Addr > &list)
	Append IndirectList contents at the end of this list.
label	appendUniq (const scalar &val)
	Same as push_uniq().
void	setSize (label n)
	Alias for resize().
void	setSize (label n, const scalar &val)
	Alias for resize().
	List (const Expression::ListExpression< E > &expr)
	Construct from value expression.
void	operator= (const Expression::ListExpression< E > &expr)
	Assign values from expression.
void	resize (const label len)
Public Member Functions inherited from UList< scalar >
	UList (const UList< scalar > &) noexcept=default
	Copy construct, shallow copy.
	UList (UList< scalar > &&) noexcept=default
	Move construct, shallow copy.
UList< scalar > &	operator= (const UList< scalar > &)=delete
	No copy assignment (default: shallow copy).
UList< scalar > &	operator= (UList< scalar > &&) noexcept=default
	Move assignment, shallow copy.
constexpr	UList () noexcept
	Default construct, zero-sized and nullptr.
	UList (scalar *__restrict__ ptr, const label len) noexcept
	Construct from components.
	UList (SubList< scalar > &&) noexcept
	Move construct from a SubList, shallow copy.
label	fcIndex (const label i) const noexcept
	The forward circular index. The next index in the list which returns to the first at the end of the list.
label	rcIndex (const label i) const noexcept
	The reverse circular index. The previous index in the list which returns to the last at the beginning of the list.
const scalar &	fcValue (const label i) const
	Return forward circular value (ie, next value in the list).
scalar &	fcValue (const label i)
	Return forward circular value (ie, next value in the list).
const scalar &	rcValue (const label i) const
	Return reverse circular value (ie, previous value in the list).
scalar &	rcValue (const label i)
	Return reverse circular value (ie, previous value in the list).
const scalar *	cdata () const noexcept
	Return pointer to the underlying array serving as data storage.
scalar *	data () noexcept
	Return pointer to the underlying array serving as data storage.
const char *	cdata_bytes () const noexcept
	Return pointer to the underlying array serving as data storage,.
char *	data_bytes () noexcept
	Return pointer to the underlying array serving as data storage,.
scalar &	front ()
	Access first element of the list, position [0].
const scalar &	front () const
	Access first element of the list.
scalar &	back ()
	Access last element of the list, position [size()-1].
const scalar &	back () const
	Access last element of the list, position [size()-1].
std::streamsize	size_bytes () const noexcept
	Number of contiguous bytes for the List data.
std::streamsize	byteSize () const
	Number of contiguous bytes for the List data, runtime FatalError if type is not contiguous.
void	checkStart (const label start) const
	Check start is within valid range [0,size).
void	checkSize (const label size) const
	Check size is within valid range [0,size].
void	checkRange (const label start, const label len) const
	Check that start and length define a valid range.
void	checkIndex (const label i) const
	Check index is within valid range [0,size).
bool	uniform () const
	True if all entries have identical values, and list is non-empty.
bool	contains (const scalar &val) const
	True if the value is contained in the list.
bool	contains (const scalar &val, label pos, label len=-1) const
	Is the value contained in the list?
label	find (const scalar &val) const
	Find index of the first occurrence of the value.
label	find (const scalar &val, label pos, label len=-1) const
	Find index of the first occurrence of the value.
label	rfind (const scalar &val, label pos=-1) const
	Find index of the last occurrence of the value.
void	moveFirst (const label i)
	Move element to the first position.
void	moveLast (const label i)
	Move element to the last position.
void	swapFirst (const label i)
	Swap element with the first element. Fatal on an empty list.
void	swapLast (const label i)
	Swap element with the last element. Fatal on an empty list.
void	shallowCopy (scalar *__restrict__ ptr, const label len) noexcept
	Copy the pointer and size.
void	shallowCopy (std::nullptr_t) noexcept
	Copy nullptr and zero size.
void	shallowCopy (const UList< scalar > &list) noexcept
	Copy the pointer and size held by the given UList.
void	deepCopy (const UList< scalar > &list)
	Copy elements of the given UList. Sizes must match!
void	deepCopy (const IndirectListBase< scalar, Addr > &list)
	Copy elements of the given indirect list. Sizes must match!
SubList< scalar >	slice (const label pos, label len=-1)
	Return SubList slice (non-const access) - no range checking.
const SubList< scalar >	slice (const label pos, label len=-1) const
	Return SubList slice (const access) - no range checking.
SubList< scalar >	slice (const labelRange &range)
	Return SubList slice (non-const access) - with range checking.
const SubList< scalar >	slice (const labelRange &range) const
	Return SubList slice (const access) - with range checking.
scalar &	operator[] (const label i)
	Return element of UList.
const scalar &	operator[] (const label i) const
	Return element of constant UList.
	operator const Foam::List< scalar > & () const
	Allow cast to a const List<T>&.
void	operator= (const scalar &val)
	Assignment of all entries to the given value.
void	operator= (Foam::zero)
	Assignment of all entries to zero.
iterator	begin () noexcept
	Return an iterator to begin traversing the UList.
iterator	end () noexcept
	Return an iterator to end traversing the UList.
iterator	begin (const label i) noexcept
	Return iterator at offset i from begin, clamped to [0,size] range.
const_iterator	cbegin () const noexcept
	Return const_iterator to begin traversing the constant UList.
const_iterator	cend () const noexcept
	Return const_iterator to end traversing the constant UList.
const_iterator	begin () const noexcept
	Return const_iterator to begin traversing the constant UList.
const_iterator	end () const noexcept
	Return const_iterator to end traversing the constant UList.
const_iterator	cbegin (const label i) const noexcept
	Return const_iterator at offset i from begin, clamped to [0,size] range.
const_iterator	begin (const label i) const noexcept
	Return const_iterator at offset i from begin, clamped to [0,size] range.
reverse_iterator	rbegin ()
	Return reverse_iterator to begin reverse traversing the UList.
reverse_iterator	rend ()
	Return reverse_iterator to end reverse traversing the UList.
const_reverse_iterator	crbegin () const
	Return const_reverse_iterator to begin reverse traversing the UList.
const_reverse_iterator	crend () const
	Return const_reverse_iterator to end reverse traversing the UList.
const_reverse_iterator	rbegin () const
	Return const_reverse_iterator to begin reverse traversing the UList.
const_reverse_iterator	rend () const
	Return const_reverse_iterator to end reverse traversing the UList.
bool	empty () const noexcept
	True if List is empty (ie, size() is zero).
label	size () const noexcept
	The number of elements in the container.
label	capacity () const noexcept
	Size of the underlying storage.
void	swap (UList< scalar > &list) noexcept
	Swap content with another UList of the same type in constant time.
bool	operator== (const UList< scalar > &list) const
	Equality operation on ULists of the same type.
bool	operator!= (const UList< scalar > &list) const
	The opposite of the equality operation. Takes linear time.
bool	operator< (const UList< scalar > &list) const
	Compare two ULists lexicographically. Takes linear time.
bool	operator> (const UList< scalar > &list) const
	Compare two ULists lexicographically. Takes linear time.
bool	operator<= (const UList< scalar > &list) const
	Return true if !(a > b). Takes linear time.
bool	operator>= (const UList< scalar > &list) const
	Return true if !(a < b). Takes linear time.
Istream &	readList (Istream &is)
	Read List contents from Istream.
void	writeEntry (const word &keyword, Ostream &os) const
	Write the List as a dictionary entry with keyword.
Ostream &	writeList (Ostream &os, const label shortLen=0) const
	Write List, with line-breaks in ASCII when length exceeds shortLen.
bool	all () const
	True if all entries are 'true' or if the list is empty.
bool	any () const
	True if any entries are 'true'.
bool	none () const
	True if no entries are 'true'.
bool	test (const label i) const
	Test `bool` value at specified position, always false for out-of-range access.
bool	get (const label i) const
	Return `bool` value at specified position, always false for out-of-range access.
bool	unset (const label i)
	Unset the `bool` entry at specified position, always false for out-of-range access.
std::string_view	view () const
	Return a string_view of the charList. Content is non-modifiable.
scalar &	first ()
	Access first element of the list, position [0].
const scalar &	first () const
	Access first element of the list.
scalar &	last ()
	Access last element of the list, position [size()-1].
const scalar &	last () const
	Access last element of the list, position [size()-1].
bool	found (const scalar &val, label pos=0) const
	Same as contains().
auto	expr () const
	Wrap value as expression.
void	operator= (const Expression::ListExpression< E > &expr)
	Assign values from expression.
	operator const Foam::List< scalar > & () const
	Allow cast to a const List<T>&.

Static Public Member Functions
static tmp< scalarField >	frequencies (const label N, const scalar deltaT)
	Return the FFT frequencies.
static tmp< scalarField >	PSD (const scalarField &PSDf)
	Return the PSD [dB/Hz].
static tmp< scalarField >	SPL (const scalarField &Prms2)
	Return the SPL [dB].
static void	octaveBandInfo (const scalarField &f, const scalar fLower, const scalar fUpper, const scalar octave, labelList &fBandIDs, scalarField &fCentre)
	Return a list of the frequency indices wrt f field that.
Static Public Member Functions inherited from Field< scalar >
static const Field< scalar > &	null () noexcept
	Return a null Field (reference to a nullObject). Behaves like an empty Field.
static autoPtr< Field< scalar > >	New (Istream &is)
	Return a pointer to a new Field created on freestore.
static tmp< Field< scalar > >	NewCalculatedType (const Field< Type2 > &f)
	Return a pointer to a new calculatedFvPatchFieldField created on freestore without setting patchField values.
Static Public Member Functions inherited from FieldBase
static void	warnLocalBoundaryConsistencyCompat (const dictionary &)
	Warn about keyword changes for local boundary consistency checks.
static int	localBoundaryConsistency () noexcept
	Get flag for local boundary consistency checks.
static int	localBoundaryConsistency (int val) noexcept
	Set flag for local boundary consistency checks.
Static Public Member Functions inherited from List< scalar >
static const List< scalar > &	null () noexcept
	Return a null List (reference to a nullObject). Behaves like an empty List.
Static Public Member Functions inherited from UList< scalar >
static const UList< scalar > &	null () noexcept
	Return a null UList (reference to a nullObject). Behaves like an empty UList.
static constexpr label	max_size () noexcept
	The size of the largest possible UList.

Static Public Attributes
static scalar	p0 = 2e-5
	Reference pressure.
Static Public Attributes inherited from FieldBase
static const char *const	typeName
	Typename for Field.
static bool	allowConstructFromLargerSize = false
	Permit read construct from a larger size.
static bool	unifiedGeometricField
	GeometricField with extra capacity for flattened boundary fields. Uses opt-switch "unifiedGeometricField".
static int	localBoundaryConsistency_
	Local boundary field consistency checks. Uses opt-switch "localBoundaryConsistency".
static scalar	localBoundaryTolerance_
	Tolerance for local boundary field consistency checks. Uses opt-switch "localBoundaryConsistency::tolerance".

Additional Inherited Members
Public Types inherited from Field< scalar >
typedef pTraits< scalar >::cmptType	cmptType
	Component type.
typedef SubField< scalar >	subField
	Declare type of subField.
Public Types inherited from List< scalar >
typedef SubList< scalar >	subList
	Declare type of subList.
Public Types inherited from UList< scalar >
typedef scalar	value_type
	The value type the list contains.
typedef scalar *	pointer
	The pointer type for non-const access to value_type items.
typedef const scalar *	const_pointer
	The pointer type for const access to value_type items.
typedef scalar &	reference
	The type used for storing into value_type objects.
typedef const scalar &	const_reference
	The type used for reading from constant value_type objects.
typedef scalar *	iterator
	Random access iterator for traversing a UList.
typedef const scalar *	const_iterator
	Random access iterator for traversing a UList.
typedef label	size_type
	The type to represent the size of a UList.
typedef label	difference_type
	The difference between iterator objects.
typedef std::reverse_iterator< iterator >	reverse_iterator
	Reverse iterator (non-const access).
typedef std::reverse_iterator< const_iterator >	const_reverse_iterator
	Reverse iterator (const access).
using	is_List
	Have unique tag.
Protected Member Functions inherited from UList< scalar >
void	setAddressableSize (const label n) noexcept
	Set addressed size to be inconsistent with allocated storage.
void	size (const label n)
	Older name for setAddressableSize.
void	writeEntry (Ostream &os) const
	Write the UList with its compound type.
labelRange	validateRange (const labelRange &requestedRange) const
	Return a validated (start,size) subset range, which means that it always addresses a valid section of the list.
void	fill_uniform (const scalar &val)
	Assign all entries to the given value.
void	fill_uniform (Foam::zero)
	Assign all entries to zero.

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

See also: windowModel.H

Definition at line 65 of file noiseFFT.H.

Constructor & Destructor Documentation

◆ noiseFFT()

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

Construct from pressure field.

Definition at line 137 of file noiseFFT.C.

◆ ~noiseFFT()

~noiseFFT ( )

Destructor. Cleanup/destroy plan.

Definition at line 169 of file noiseFFT.C.

Member Function Documentation

◆ frequencies()

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

static

Return the FFT frequencies.

Definition at line 36 of file noiseFFT.C.

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

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◆ PSD() [1/2]

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

static

Return the PSD [dB/Hz].

Input PSD in [Pa^2/Hz]

Definition at line 55 of file noiseFFT.C.

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

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◆ SPL()

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

static

Return the SPL [dB].

Input P(rms)^2 in [Pa^2]

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 )