SimpleFreeFieldHRSOS

This conventions defines free-field HRTFs stored as second-order sections, measured with an omnidirectional source for a single listener.

Based on SimpleFreeFieldHRIR, the only difference is the DataType, that is SOS.

The conventions is defined in AES69-2020 (SOFA 2.0).

Name	Default	Flags	Dimensions	Type	Comment
GLOBAL:Conventions	SOFA	rm		attribute
GLOBAL:Version	1.0	rm		attribute
GLOBAL:SOFAConventions	SimpleFreeFieldHRSOS	rm		attribute	This convention set follows SimpleFreeFieldHRIR but the data is stored as second-order section (SOS) coefficients.
GLOBAL:SOFAConventionsVersion	2.0	rm		attribute
GLOBAL:APIName		rm		attribute
GLOBAL:APIVersion		rm		attribute
GLOBAL:ApplicationName				attribute
GLOBAL:ApplicationVersion				attribute
GLOBAL:AuthorContact		m		attribute
GLOBAL:Comment				attribute
GLOBAL:DataType	SOS	rm		attribute	Filters described as second-order section (SOS) coefficients
GLOBAL:History				attribute
GLOBAL:License	No license provided, ask the author for permission	m		attribute
GLOBAL:Organization		m		attribute
GLOBAL:References				attribute
GLOBAL:RoomType	free field	m		attribute
GLOBAL:Origin				attribute
GLOBAL:DateCreated		m		attribute
GLOBAL:DateModified		m		attribute
GLOBAL:Title		m		attribute
ListenerPosition	[0 0 0]	m	IC, MC	double
ListenerPosition:Type	cartesian	m		attribute
ListenerPosition:Units	metre	m		attribute
ReceiverPosition	[0 0.09 0; 0 -0.09 0]	m	rCI, rCM	double
ReceiverPosition:Type	cartesian	m		attribute
ReceiverPosition:Units	metre	m		attribute
SourcePosition	[0 0 1]	m	IC, MC	double	Source position is assumed to vary for different directions/positions around the listener
SourcePosition:Type	spherical	m		attribute
SourcePosition:Units	degree, degree, metre	m		attribute
EmitterPosition	[0 0 0]	m	eCI, eCM	double
EmitterPosition:Type	cartesian	m		attribute
EmitterPosition:Units	metre	m		attribute
GLOBAL:DatabaseName		m		attribute	name of the database to which these data belong
GLOBAL:ListenerShortName		m		attribute	ID of the subject from the database
ListenerUp	[0 0 1]	m	IC, MC	double
ListenerView	[1 0 0]	m	IC, MC	double
ListenerView:Type	cartesian	m		attribute
ListenerView:Units	metre	m		attribute
Data.SOS	permute([0 0 0 1 0 0; 0 0 0 1 0 0], [3 1 2]);	m	mRn	double	Filter coefficients as SOS coefficients.
Data.SamplingRate	48000	m	I	double	Sampling rate of the coefficients in Data.SOS and the delay in Data.Delay
Data.SamplingRate:Units	hertz	m		attribute
Data.Delay	[0 0]	m	IR, MR	double	Broadband delay (in samples resulting from SamplingRate)