Comparison of Different Methods to Create an Interactive Augmented Auditory Reality Scenario From Sparse Binaural Room Impulse Response Measurements
* Presenting author
Auditory illusion of a spatial acoustic environment can be created with the help of existing spatial audio systems. Psychoacoustically adequate ear signals can be created by using binaural synthesis approaches. The creation of a plausible auditory illusion is shown coherently in a wide range of research projects. But the occurrence of such a plausible auditory illusion depends on an adequate technical realization and on several context dependent quality parameters like congruence between synthesized scene and the listening environment. A room divergent scenario yields a clear decrease of perceived externalization. Room acoustic divergence can occur if synthesis methods of binaural room impulse response (BRIRs) are used. The contribution presents a binaural synthesis system, which adds a virtual sound source to the real room. The realization is based on BRIRs measured with a sparse distribution in that room. To provide a certain area of action for the listener, a dense grid of BRIRs is generated using energy- and time-based BRIRs synthesis approaches. The evaluation of the system includes the quality features overall impression, localization stability, and externalization under test condition with translation and head movement of the test person. For comparison purposes, a fully measured dataset was included in the test.