THE AUDITORY MODELING TOOLBOX

Applies to version: 1.4.0

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ZIEGELWANGER2013 - Direction-continuous model of time-of-arrival (TOA) in HRTFs (simple)

Usage:

[Obj,results]=ziegelwanger2013(Obj,method,model,p0_onaxis)

Input parameters:

Obj SOFA object
method (Optional) Select one of the estimation methods
model (Optional) Correct estimated toa, using geometrical TOA-Model. If \(model=0\) use TOA estimated, if \(model=1\) use TOA modeled (default).
p0_onaxis (optional) Starting values for lsqcurvefit

Output parameters:

Obj

SOFA Object

  • results.toa data matrix with time of arrival (TOA) for each impulse response (IR):
  • results.p_onaxis estimated on-axis model-parameters
  • results.p_offaxis estimated off-axis model-parameters

Description:

Estimates the Time-of-Arrival for each measurement in Obj (SOFA) and corrects the results with a geometrical model of the head.

The value of method is an integer choosing one of the following methods. XXX Explain for each method a little about how they work:

  1. Threshold-Detection
  2. Centroid of squared IR
  3. Mean Groupdelay
  4. Minimal-Phase Cross-Correlation (Max) (default)

Requirements:

  1. SOFA API from http://sourceforge.net/projects/sofacoustics for Matlab (in e.g. thirdparty/SOFA)
  2. Optimization Toolbox for Matlab

Examples:

To calculate the model parameters for the on-axis time-of-arrival model (p_onaxis) and for the off-axis time-of-arrival model (p_offaxis) for a given HRTF set (SOFA object, 'Obj') with the minimum-phase cross-correlation method, use:

[Obj,results]=ziegelwanger2013(Obj,4,1);

References:

P. Majdak and H. Ziegelwanger. Continuous-direction model of the broadband time-of-arrival in the head-related transfer functions. In ICA 2013 Montreal, volume 19, page 050016, Montreal, Canada, 2013. ASA. [ DOI ]

H. Ziegelwanger and P. Majdak. Modeling the broadband time-of-arrival of the head-related transfer functions for binaural audio. In Proceedings of the 134th Convention of the Audio Engineering Society, page 7, Rome, 2013.

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