Auditory distance perception and externalization in virtual acoustic environments with different acoustic level of detail (en)

* Presenting author
Day / Time: 08.03.2023, 10:20-10:40
Room: Saal X11-12
Typ: Regulärer Vortrag
Abstract: The use of complex acoustic environments to access auditory perception in ecologically relevant everyday situations is becoming an integral task in virtual acoustics. Virtual acoustic environments can help bridging the gap between “classical” psychoacoustics with simplified, artificial stimuli and real acoustic environments. Acoustic communication often takes place in enclosed spaces with reverberation and the required room acoustical simulation has to be simplified, particularly for real-time applications. The question arises which acoustic level of detail (ALOD) is required in the simulation in order to capture the perceptually relevant effects.Here, binaural room impulse responses (BRIRs) of three different real environments, a typical living room with a connected kitchen, a pub, and an underground station were simulated with multiple ALODs. The simulations were evaluated using headphones in comparison to BRIRs measured with a dummy head in the corresponding real environments, and in a 3-dimensional loudspeaker array. ALOD was varied by including a different number of early reflections, simplified rendering of late reverberation, and using conditions where only the direct sound was presented. Spatial audio quality was assessed for a pink pulse, a music sample, and a speech token with a focus on auditory distance perception and externalization, in addition to testing plausibility.


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