BINAURAL SIMULATIONS USING AUDIO RATE FDTD SCHEMES AND CUDA
BINAURAL SIMULATIONS USING AUDIO RATE FDTD SCHEMES AND CUDA
复制标题
使用音频速率 FDTD 方案和 CUDA 的双耳模拟
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
S. Bilbao
中科院分区：
文献类型：
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作者：
Craig J. Webb;S. Bilbao
三维时域有限差分格式可以作为空间音频模拟的一种方法。通过在3D计算空间中嵌入人头模型，这种模拟可以模拟双耳声音定位。这种方法通常依赖于使用高采样率来提供精细的模型，并且计算密集。本文研究了音频速率FDTD方案中头部模型的使用，范围从176.4到44.1千赫。使用采用NVIDIA CUDA架构的GPU计算，模拟可以在C语言中的串行计算中加速数倍。这使得可以产生高效的动态模拟，其中声音可以在运行时四处移动。通过在消声立方体中放置一个个性化的头部模型，可以生成声音样本。在最低采样率44.1 kHz下，局部化在水平面上很明显，但在其他维度上就不那么明显了。在176.4，有更大的三维深度，从前到后可察觉，并有一些垂直运动。
Three dimensional finite difference time domain schemes can be used as an approach to spatial audio simulation. By embedding a model of the human head in a 3D computational space, such simulations can emulate binaural sound localisation. This approach normally relies on using high sample rates to give finely detailed models, and is computationally intensive. This paper examines the use of head models within audio rate FDTD schemes, ranging from 176.4 down to 44.1 kHz. Using GPU computing with Nvidia’s CUDA architecture, simulations can be accelerated many times over a serial computation in C. This allows efficient, dynamic simulations to be produced where sounds can be moved around during the runtime. Sound examples have been generated by placing a personalised head model inside an anechoic cube. At the lowest sample rate, 44.1 kHz, localisation is clear in the horizontal plane but much less so in the other dimensions. At 176.4, there is far greater three dimensional depth, with perceptible front to back, and some vertical movement.