In this paper we propose an experiment that evaluates the influence of audience noise on the feeling of presence and the perceived quality in a virtual reality concert experience delivered using Wave Field Synthesis. A 360 degree video of a live rock concert from a local band was recorded. Single sound sources from the stage and the PA system were recorded, as well as the audience noise, and impulse responses of the concert venue. The audience noise was implemented in the production phase. A comparative study compared an experience with and without audience noise. In a between subject experiment with 30 participants we found that audience noise does not have a significant impact on presence. However, qualitative evaluations show that the naturalness of the sonic experience delivered through wavefield synthesis had a positive impact on the participants.

In virtual reality environments that allow users to walk freely, the area of the virtual environment (VE) is constrained to the size of the tracking area. By using redirection techniques, this problem can be partially circumvented; one of the techniques involves rotating the user more or less in the virtual world than in the physical world; this technique is referred to as rotational gain. Experiments conducted by Frank Steinicke et al. [7] sought to uncover users' ability to detect the usage of rotational gain. This paper seeks to further investigate this area, examining the effect of visual density in the VE. Testing visual density using 0, 4 and 16 objects did not seem to reveal the point at which the test participants become noticeably affected.