Imperial College London

Perceptual implications of different Ambisonics-based methods for binaural reverberation

Isaac Engel, Craig Henry, Sebastià V Amengual Garí, Philip W Robinson, Lorenzo Picinali
February 4, 2021
The Journal of the Acoustical Society of America
Acoustical Society of America

Reverberation is essential for the realistic auralisation of enclosed spaces. However, it can be computationally expensive to render with high fidelity and, in practice, simplified models are typically used to lower costs while preserving perceived quality. Ambisonics-based methods may be employed to this purpose as they allow us to render a reverberant sound field more efficiently by limiting its spatial resolution. The present study explores the perceptual impact of two simplifications of Ambisonics-based binaural reverberation that aim to improve efficiency. First, a “hybrid Ambisonics” approach is proposed in which the direct sound path is generated by convolution with a spatially dense head related impulse response set, separately from reverberation. Second, the reverberant virtual loudspeaker method (RVL) is presented as a computationally efficient approach to dynamically render binaural reverberation for …

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