SofaMyRoom - VAST

Table of Contents

• SofaMyRoom - VAST

  • VAST structure

    • Legend

Here is reported the organization of the VAST structure. The VAST project is available here.

Important

In this version, the VAST dataset can handle more than six frequency bands and, moreover, the HRTF dataset is not restricted to the one recorded at MIT on the KEMAR mannequin.

VAST structure

The VAST dataset is stored with the multilevel MATLAB struct. In order to initialize and populate a VAST dataset check the script VAST/DemoVAST.m.

Warning

The size of the arrays are reported in the legend below

Name			Type	Description
GlobalParams			struct	Simulation Parameters
SamplingFrequency			double	Sampling Frequency of the BRIRs
FreqBin			[1, F] double	Frequency bands used to compute the BRIRs - refer to room.surface.frequency
RIRLengthTime			double	Length in seconds of the BRIRs
RIR			struct	BRIR container
	Left		[L, N] single	RIR for the left ear
	Right		[L, N] single	RIR for the right ear
Room			struct	Acoustic parameters
	Size		[3, N] single	(width, depth, height) dimensions in meters
	FreqRT60		[F, N] single	Reverberation Time is seconds for each frequency band
	GlobalRT60		[1, N] single	Overall Reverberation Time is seconds
	Diffusion		[F, N] single	Diffusion coefficients for each frequency band
	Absorption		struct	Absorption coefficients for each frequency band
		NorthWall	[F, N] single
		WestWall	[F, N] single
		SouthWall	[F, N] single
		EastWall	[F, N] single
		Ceiling	[F, N] single
		Floor	[F, N] single
Receiver			struct	Receivers characterization
	Position		[3, N] single	(x,y,z) in meters for each receiver
	Orientation		[1, N] single	tilt in degree
	HRTF		struct	HRTF dataset
		Fs	double	Sampling Frequency in hertz
		Left	[D, K] double	Impulse responses of the left ear
		Right	[D, K] double	as above for the right ear
Source			struct	Sources characterization
	Azimuth		[1, N] single	Azimuth angle in respect to receiver. Values in degree.
	Elevation		[1, N] single	Elevation angle in respect to receiver. Values in degree.
	Distance		[1, N] single	Distance in respect to receiver. Values in meters
	AbsolutePos		[3, N] single	Cartesian coordinates in respect to the room. Values in meters.

Legend

Name	Description
F	Number of frequency bands
N	RIRs available in VAST
L	Length in samples of the RIRs
D	Length in samples of the HRIRs
K	HRIRs available