Abstract
This exploratory study investigates peoples' ability to discriminate between real and virtual sound sources in a position-dynamic headphone based augmented audio scene. For this purpose, an acoustic scene was created consisting of two loudspeakers at different positions in a small seminar room. Considering the presence of headphones, non-individualized BRIRs measured along a line with a dummy head wearing AKG K1000 headphones were used to allow for head rotation and translation. In a psychoacoustic experiment, participants had to explore the acoustic scene and tell which sound source they believe is real or virtual. The test cases included a dialog scenario, stereo pop-music and one person speaking while the other speaker played mono-music simultaneously. Results show that the participants were on trend able to debunk individual virtual sources. However, for the cases where both sound sources reproduced sound simultaneously, lower distinguishability rates were observed.