Efficient Synthesis of Room Acoustics via Scattering Delay Networks
Efficient Synthesis of Room Acoustics via Scattering Delay Networks
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DOI：
10.1109/taslp.2015.2438547
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发表时间：
2015-02
期刊：
影响因子：
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通讯作者：
E. D. Sena;H. Hacıhabiboğlu;Z. Cvetković;J. Smith
中科院分区：
文献类型：
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作者：
E. D. Sena;H. Hacıhabiboğlu;Z. Cvetković;J. Smith
提出了一种由延迟线网络组成的混响器。混响器的所有参数都来源于它所模拟的箱体的物理特性。它允许模拟不均匀和频率相关的壁吸收，以及定向源和麦克风。混响器精确地呈现一阶反射，同时逐渐近似高阶反射。能量衰减速率与图像法（IM）的计算结果接近，与Sabine方程和Eyring方程的预测结果一致。归一化回声密度的时间演变与混响的感知纹理相关，这与IM的时间演变也很接近。但是，它的计算复杂度比反馈延迟网络的计算复杂度低一到两个数量级，对存储器的要求可以忽略不计。
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 the IM. However, its computational complexity is one to two orders of magnitude lower, comparable to the computational complexity of a feedback delay network and its memory requirements are negligible.