We plan to regularly update the toolbox. If you have suggestions for improvement please contact one of the authors.

Installation

• Install the Binaural-modeling software from Michael Akeroyd (the m-functions "mmakeerbfilters.m*", "merbfilterbank.m*", and "mmonauraltransduction.m" are needed).
• Alternatively to installing the beforementioned toolbox, just copy the mentioned m-files into the directory of the Binaural Cue Selection Toolbox.
• Install the Binaural Cue Selection Toolbox for Linux X86, MacOS X, or Windows. The package is provided with a ready-to-use executable for the three mentioned different platforms. For other platforms you will need to compile the source for the C-executable "ilditdic" or use the slower Matlab version (set FAST = 0 in ild_itd_ic.m).
• Start Matlab and set the current working directory to the directory of the Binaural Cue Selection Toolbox.
• Run the program example1.m.

* = these two functions are originally from the Auditory Toolbox from Malcolm Slaney

Usage examples

The example program example1.m runs the cue selection at critical bands with a specific center frequency. The results can be shown in different ways:

• Cue selection illustrated in the time-domain. Similar to Figs. 2 and 6 in [1].
• Cue selection illustrated with probability density functions (PDFs). Similar to Figs. 4, 5, and 10 in [1].
• Illustration of effectivity of cue selection as a function of the cue selection threshold c₀. ITD and ILD bias are shown as a function of c₀ similar to Figs. 3 and 7 in [1].

[1] C. Faller and J. Merimaa, "Source localization in complex listening situations: Selection of binaural cues based on interaural coherence", J. Acoust. Soc. Am., Vol. 116, No. 5, November 2004.

Functions

The following functions are part of the Cue Selection Toolbox. For more detailed information type help xxx in Matlab, where xxx is the function name.

function ild_itd_ic:

Applies model of auditory periphery and computes ITD, ILD, and IC cues for one critical band pair (left and right ears).

function biasdev_c0:

Computes ITD or ILD bias and standard deviation for one specific cue selection threshold c₀.

function biasdev_c0_N:

Computes ITD or ILD bias and standard deviation for a range of cue selection thresholds c₀.

function c0_pwr:

Iteratively computes the cue selection threshold c₀ such that the selected cues represent a desired fraction of the total signal power.

function c0_dev:

Iteratively computes the cue selection threshold c₀ such that the selected cues have a desired ITD or ILD standard deviation.

function pdf_c0:

Computes the probability density function (PDF) of cues obtained with the cue selection with a specific c₀.

function plot_pdf:

Plot ITD and ILD probability density functions.

function plot_time_select:

Plot the results of the cue selection in the time-domain.

function pwr_c0:

Computes the fraction of power that respresents the selected cues for a specific cue selection threshold c₀.