Perceptual evaluation of auditory localisation typically relies on graphical user interfaces, pointing devices, or touch screens to capture listener responses. These modalities implicitly require functional vision and/or manual dexterity, excluding participation of, for instance, people with visual impairments. This paper presents a solution for absolute sound-source localisation testing that uses head rotation, tracked by a six-degrees-of-freedom (6-DoF) optical motion-capture system as the response interface and relies solely on auditory cues for calibration and pointing. The paradigm builds on the natural coupling between auditory spatial attention and head orientation. Individual systematic bias is characterised via a mandatory training block in which stimuli are presented at discrete loudspeaker positions. A per-participant linear regression fitted to head-centred training responses provides a bias model that is applied to main-experiment trials, enabling decomposition of localisation error (LE) into constant error (CE, reflecting accuracy) and random error (RE, reflecting precision), following the established accuracy--precision framework for spatial hearing assessment. The specific use case simulates off-sweet-spot listening positions to inform development of a renderer aimed at enhancing the experience of visually impaired audiences consuming audio-described broadcast content. Preliminary data from the control group consisting of sighted participants are presented. The interface design, calibration procedure, and analysis pipeline are offered as a contribution towards inclusive spatial audio evaluation practice.
