*3.1.1 Coordinate systems*

The methodology makes use of both spherical and interaural coordinate systems, illustrated in **Figure 1**. While the spherical coordinate system provides an intuitive perspective on the results, the interaural system has been especially designed to separate the analysis of binaural and monaural cues, as discussed in Section 2.1.1, making it a natural choice for the analysis of HRTF-related localisation performance.
