Spatial Audio Perception
Research Team Members
André van Schaik
We are investigating the relationship between the Fourier-Bessel representation of a sound field and the acoustic cues related to human spatial auditory perception. The Fourier-Bessel representation of sound field provides an adequate mean to synthesise a spatial sound field using a loudspeaker array. However, we do not yet fully understand how to relate the Fourier-Bessel decomposition to perceptual cues for human spatial audio perception. As well, we are investigating novel techniques related to the rendering of virtual auditory space (VAS). Areas of intereest are spatial augmented-reality audio (where real and virtual spatial sounds are mixed), the synthesis of binaural room impulse responses (BRIR) from microphe array recordings, near-field simulations, and synthesis of individualised VAS from image measurements of a listener's ears. We are also interested in the application of VAS technology for sonification of data as spatial audio — currently we are sonifying EEG signals to enhance medical observation of the data.
Figure 1: (a) The anechoic chamber in the Auditory Neuroscience Laboratory (ANL) at the University of Sydney. (b) A subject undergoing a head-related impulse response recording. (c) The recording microphones were tightly wrapped in soft surgical tape to completely seal the ear canal. (d) The recording microphone in a subject’s ear canal.