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SP-1 | Spatial Audio | R3 | 2018-11-14 | 12:30 - 14:30
moderiert von Thomas Lund
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Investigations on the Impact of Distance Cues in Virtual Acoustic Environments
SP-1-2 | Beginn 13:00 | Dauer 30 min. | Christoph Pörschmann |
Johannes M. Arend, Philipp Stade | AES Reviewed Paper (Englisch)
In this paper, we analyze different auditory distance cues in dynamic binaural synthesis. We compare the contributions of sound intensity, direct-to-reverberant ratio (DRR), and of near-field cues. For the auralization, we use the BinRIR method, which allows to generate binaural room impulse responses (BRIRs) for dynamic binaural synthesis based on a measured omnidirectional room impulse response (RIR). With BinRIR based on a simple geometric model, the listener position can be freely adjusted and the distance cues can be adapted separately. Furthermore, near-field head-related impulse responses (HRIRs) can be applied for direct sound and early reflections if the listener is very close to the virtual sound source. In a listening experiment, we presented stimuli at different distances in four synthesized rooms. In one condition, the stimuli contained natural distance-dependent intensity cues, and in another condition, the stimuli were loudness normalized. The results showed that even for loudness-normalized stimuli, an adequate distance perception can be obtained by adapting the DRR. The influence of near-field HRIRs, which were as well tested in the experiment, is very weak.