Efficient Synthesis of Room Acoustics via Scattering Delay Networks

Abstract

An acoustic reverberator consisting of a network of delay lines connected via scattering junctions is proposed. All parameters of the reverberator are derived from physical properties of the enclosure it simulates. It allows for simulation of unequal and frequency-dependent wall absorption, as well as directional sources and microphones. The reverberator renders the first-order reflections exactly, while making progressively coarser approximations of higher-order reflections. The rate of energy decay is close to that obtained with the image method (IM) and consistent with the predictions of Sabine and Eyring equations. The time evolution of the normalized echo density, which was previously shown to be correlated with the perceived texture of reverberation, is also close to that of IM. However, its computational complexity is one to two orders of magnitude lower, comparable to the computational complexity of a feedback delay network (FDN), and its memory requirements are negligible.

Cited by in corpus (7)

• On Lossless Feedback Delay Networks
• Modal Decomposition of Feedback Delay Networks
• Allpass Feedback Delay Networks
• Data-Driven Room Acoustic Modeling Via Differentiable Feedback Delay Networks With Learnable Delay Lines
• Computationally-efficient and perceptually-motivated rendering of diffuse reflections in room acoustics simulation
• Past, Present, and Future of Spatial Audio and Room Acoustics
• A State-of-the-Art Review on Acoustic Preservation of Historical Worship Spaces through Auralization