BAUMGARTNER2017 - Model for sound externalization

Usage

[E,lat] = baumgartner2017( target,template )

Input parameters

`target`	binaural impulse response(s) referring to the directional transfer function(s) (DFTs) of the target sound(s). Option 1: given in SOFA format -> sagittal plane DTFs will be extracted internally. Option 2: binaural impulse responses of all available listener-specific DTFs of the sagittal plane formated according to the following matrix dimensions: time x direction x channel/ear
`template`	binaural impulse responses of all available listener-specific DTFs of the sagittal plane referring to the perceived lateral angle of the target sound. Options 1 & 2 equivalent to target.

Output parameters

`E`	predicted degree of externalization
`lat`	lateral angle as predicted by wierstorf2013 model

Description

baumgartner2017(...) is a model for sound externalization. It bases on the comparison of the intra-aural internal representation of the incoming sound with a template and results in a probabilistic prediction of polar angle response.

baumgartner2017 accepts the following optional parameters:

`'fs',fs`	Define the sampling rate of the impulse responses. Default value is 48000 Hz.
`'S',S`	Set the listener-specific sensitivity threshold (threshold of the sigmoid link function representing the psychometric link between transformation from the distance metric and similarity index) to S. Default value is 1.
`'lat',lat`	Set the apparent lateral angle of the target sound to lat. Default value is 0 degree (median SP).
`'stim',stim`	Define the stimulus (source signal without directional features). As default an impulse is used.
`'fsstim',fss`	Define the sampling rate of the stimulus. Default value is 48000 Hz.
`'flow',flow`	Set the lowest frequency in the filterbank to flow. Default value is 700 Hz.
`'fhigh',fhigh`	Set the highest frequency in the filterbank to fhigh. Default value is 18000 Hz.
`'space',sp`	Set spacing of auditory filter bands (i.e., distance between neighbouring bands) to sp in number of equivalent rectangular bandwidths (ERBs). Default value is 1 ERB.
`'do',do`	Set the differential order of the spectral gradient extraction to do. Default value is 1 and includes restriction to positive gradients inspired by cat DCN functionality.
`'bwcoef',bwc`	Set the binaural weighting coefficient bwc. Default value is 13 degrees.

Requirements: