AES Show 2024 NY

In order to design efficient binaural rendering systems for 3D audio, it’s important to understand how delays in updating the relative directions of sound sources from a listener to compensate for listener’s head movements affect the sense of realism. However, sufficient study has not yet been done with this problem. We therefore investigated the delay detection capability (threshold) of hearing during localization of audio objects. We used moving sound sources emitted from loudspeakers emulating smooth update of head related transfer functions (HRTFs) and delayed update of HRTFs. We investigated the delay detection threshold with different bandwidth, direction, and speed of sound source signals. As a result, the delay detection thresholds in this experiment were found to be approximately 100ms to 500ms, and it was observed that the detection thresholds vary depending on the bandwidth and direction of the sound source. On the other hand, no significant variation in detection thresholds was observed based on the speed of sound source movement.