An Assessment of Spatial Fidelity of Higher-Order Ambisonics Reproduction Using the SCaLAr System
Surrounding spherical loudspeaker arrays enable the reproduction of virtual acoustic environments by employing a variety of spatial sound reproduction methods. The design and implementation of such a system requires careful consideration of the practical limitations, such as spatial dimensions and placement accuracy. A 68-channel system covering a spherical cap was constructed at the Institute for Hearing Technology and Acoustics and objectively evaluated based on extensive measurements before and after mounting (Pausch et al. 2020). Furthermore, a two-step subjective evaluation by means of a localization and a spatial release from masking experiment was performed focusing on the effect of increasing order of Ambisonics reproduction. Multiple real and virtual sound source positions are tested in terms of localization accuracy and the speech reception benefit of spatially separated target and distractor sources.Pausch, Behler & Fels. 2020. SCaLAr – A surrounding spherical cap loudspeaker array for flexible generation and evaluation of virtual acoustic environments. Acta Acustica, 4, 19.