data_mclachlan2024
Responses from a dynamic sound-localization experiment (many repetitions)

Usage:

data = data_mclachlan2024(condition);
data = data_mclachlan2024(condition, id);

Input parameters:

condition

Optional condition of the experiment:

'static': Static localization, i.e., the head rotations of the subjects were not tracked and the subjects had to keep the head still. Default.
'dynamic': Dynamic localization, i.e., the head rotations of the subjects were tracked and the subjects had to rotate their head in a specified direction (towards 90 or 270 degrees).

id Optional string specifying the subject ID. It can be one of the following: 'NH214', 'NH257', 'NH919', 'NH963', 'NH1144', 'NH1146', 'NH1147', 'NH1150'. Default: All subjects.

Output parameters:

data

Structure array with the following fields for each subject:

id: ID of the subject.
HRTF: SOFA structure with the subject's HRTFs.
T: Cell array with head rotations. Size: (trial). Per trial, each cell has the size: (time x pos), with time being unclear and pos representing the head direction in columns:
- 1: Azimuth angle (in degrees).
- 2: Elevation angle (in degrees).
- 3: Radius (in m).
m_exp: Matrix with the behavioral responses. Size: (trial x C x P).

Description:

The dimension C encodes the data obtained in each trial:

1 and 2: Target azimuth and elevation (in degrees).
3 and 4: Response azimuth and elevation (in degrees).
5 and 6: Target lateral and polar angles (in degrees).
7 and 8: Response lateral and polar angles (in degrees).
9, 10, and 11: Target Cartesian coordinates X, Y, and Z (Units unclear).
12, 13, and 14: Response Cartesian coordinates X, Y, and Z (Units unclear).
15: Trial duration (probably in ms, however, unclear).
16: Required head-rotation direction (towards 90 or 270 degrees).
17: Subject number. Meaning unclear.

The dimension P encodes the experiment condition:

1: Binaural, i.e., signals presented via headphones.
2: Freefield, i.e., signals presented via loudspeakers.

data_mclachlan2024(..) returns data from McLachlan et al. (2024), which describes results from a sound-localisation experiment done under static and dynamic conditions, i.e., without and with head rotations, respectively. The focus of this study was put on many repetitions of a few of spatial targets, as in contrast to McLachlan et al. (2023).

References:

G. McLachlan, P. Majdak, J. Reijniers, M. Mihocic, and H. Peremans. Insights into dynamic sound localisation: A direction-dependent comparison between human listeners and a Bayesian model, Apr. 2024. [ DOI ]