MCLACHLAN2021 - - A dynamic ideal-observer model of human sound localization

Usage

[results,template,target] = mclachlan2014(template,target,'num_exp',20,'sig_S',4.2);

template.fs: sampling rate (Hz)
template.fc: ERB frequency channels (Hz)
template.itd0: itd computed for each hrir (samples)
template.H: Matrix containing absolute values of HRTFS for all grid points
template.coords: Matrix containing cartesian coordinates of all grid points, normed to radius 1m
template.T: angular template for each coordinate
target.fs: sampling rate
target.fc: ERB frequency channels
target.itd0: itd corresponding to source position
target.S: sound source spectrum
target.H: Matrix containing absolute values of HRTFS for all source directions
target.coords: Matrix containing cartesian coordinates of all source positions to be estimated, normed to radius 1m
target.T: angular template for each coordinate

`doa`	directions of arrival in spherical coordinates
`--X_DOT_est`	: estimated [num_sources, num_repetitions, 3] .real : actual [num_sources, 3]
`params`	additional model's data computerd for estimations
`--X_DOT_est_idx`	: Indices corresponding to template direction where the maximum probability density for each source position is found

`--X_DOT_post_prob`	: Maximum posterior probability density for each target source
`--X_DOT_freq_channels`
	: number of auditory channels
`--X_DOT_T_template`	: Struct with template data elaborated by the model
`--X_DOT_T_target`	: Struct with target data elaborated by the model

.Tidx

MCLACHLAN2021 accepts the following optional parameters:

'num_exp=num_exp Set the number of localization trials.': Default is num_exp = 500.

`'SNR',SNR`	Set the signal to noise ratio corresponding to different sound source intensities. Default value is SNR = 75 [dB]
`'dt',dt`	Time between each acoustic measurement in seconds. Default value is dt = 0.005.
`'sig_itd0',sig`	Set standard deviation for the noise on the initial itd. Default value is sig_itd0 = 0.569.
`'sig_itdi',sig`	Set standard deviation for the noise on the itd change per time step. Default value is sig_itdi = 1.
`'sig_I',sig`	Set standard deviation for the internal noise. Default value is sig_I = 3.5.
`'sig_S',sig`	Set standard deviation for the variation on the source spectrum. Default value is sig_S = 3.5.
`'rot_type',type`	Set rotation type. Options are 'yaw', 'pitch' and 'roll'. Default value is 'yaw'.
`'rot_size',size`	Set rotation amount in degrees. Default value is rot_size = 0.
`'stim_dur',dur`	Set stimulus duration in seconds. Default value is stim_dur = 0.1.

Further, cache flags (see amt_cache) can be specified.