Perceptual comparison of measured, modeled and simulated OBRIRs for virtual human echolocation
* Presenting author
Oral binaural room impulse responses (OBRIRs) describe the transfer path from a person’s mouth through the room to the ears of the same person. OBRIRs can be used to realize human echolocation scenarios in virtual acoustic environments for headphone based reproduction. In this paper different approaches to create OBRIRs for the case of a single reflecting surface close to a person’s head in an anechoic environment are studied regarding their perceptual deviations. This includes OBRIRs measured with a head, torso and mouth simulator, OBRIRs simulated with a raytracing-based toolbox and OBRIRs generated with a spherical head model with a circular piston.A Repertory Grid experiment was conducted with 20 mostly naïve listeners to find suitable constructs for evaluating the audible differences. In this investigation the participants had to work with given speech instead of talking themselves to focus on the effect of the different approaches. A detailed analysis of the results is provided.