Perceived width evaluation on interpolated line sources in a virtual urban square

The aim of this study is to investigate the relation-ship between the perceived width and different interpolation setups of a line source, and whether it is possible to reduce interpolations of a line source in a virtual open urban space. In order to auralise sound sources efficiently and accurately, the subjective evaluation was carried out in accordance with Virtual Reality (VR) with spatial audio. The results show that when the audible angle between adjacent interpolation points of a line source is lowered to $1^{\mathrm{o}}$, the perceived width of the line source will significantly improve under VR experience. When the angle is less than $1^{\mathrm{o}}$, the variation in points interpolation does not significantly affect the perceived width. This improvement may enhance the immersion during subjective evaluation, thus creating a more realistic experience.