Schedule as of Oct 11, 2022 - subject to change

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Thursday, October 20 • 9:20am - 9:40am
A Perceptual Evaluation of Spatial Room Impulse Responses Convolved with Multichannel Direct Sound

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Sound sources have complex three-dimensional radiation characteristics that vary over time. In real-world listening, these dynamic fluctuations in directivity map to the reflective environment to which the source is coupled. Artificial reverberation tools for audio post-production do not currently account for this in their designs. A listening test was conducted to compare two artificial reverberation treatments for spatial room impulse response-based convolution over headphones. In the first treatment, all SRIR channels were convolved with a single monophonic direct sound file, recorded with a microphone placed in front of the performer. In the second, each of the 24 SRIR channels were convolved with a corresponding hemi-anechoic microphone position. To quantify the perceptual differences between the two treatments, participants’ sense of physical presence, sensory immersion, environment / room width, and naturalness of the sound source were evaluated. Results of three-way within-subject ANOVAs show that the multichannel direct sound convolution treatment significantly improved participants ratings of all attributes under test, and was preferred over the monophonic direct sound treatment. A significant interaction between reverberation treatment and instrument type was observed for environment / room width. The study suggests that this technique can be effective, and more broadly supports the notion that representing a sound-sources’ time-variant directivity in artificial reverberation could be a beneficial feature in the design of 3D audio production tools.

avatar for Jack Kelly

Jack Kelly

McGill University
Jack Kelly is. Ph.D. candidate at the Schulich School of Music, McGill University. His thesis research centers on the influence of spatial room impulse response convolution technologies (channel-based and HOA arrays) on the sensation of physical presence in immersive music production. He... Read More →
avatar for Richard King

Richard King

McGill University
Richard King is an Educator, Researcher, and a Grammy Award winning recording engineer. Richard has garnered Grammy Awards in various fields including Best Engineered Album in both the Classical and Non-Classical categories. Richard is an Associate Professor at the Schulich School... Read More →

Thursday October 20, 2022 9:20am - 9:40am EDT