The University of Tokyo, Graduate School of Information Science and Technology, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
J Acoust Soc Am. 2021 Oct;150(4):2479. doi: 10.1121/10.0006538.
A method of binaural rendering from microphone array signals of arbitrary geometry is proposed. To reproduce binaural signals from microphone array recordings at a remote location, a spherical microphone array is generally used for capturing a soundfield. However, owing to the lack of flexibility in the microphone arrangement, the single spherical array is sometimes impractical for estimating a large region of a soundfield. We propose a method based on harmonic analysis of infinite order, which allows the use of arbitrarily placed microphones. In the synthesis of the estimated soundfield, a spherical-wave-decomposition-based binaural rendering is also formulated to take into consideration the distance in measuring head-related transfer functions. We develop and evaluate a composite microphone array consisting of multiple small arrays. Experimental results including those of listening tests indicate that our proposed method is robust against change in listening position in the recording area.
提出了一种从任意几何形状的传声器阵列信号进行双耳渲染的方法。为了在远程位置从传声器阵列记录中再现双耳信号，通常使用球形传声器阵列来捕获声场。然而，由于麦克风布置缺乏灵活性，单个球形阵列有时对于估计声场的大区域是不切实际的。我们提出了一种基于无限阶谐波分析的方法，该方法允许使用任意放置的麦克风。在估计声场的合成中，还基于球面波分解来制定双耳渲染，以考虑测量头相关传递函数时的距离。我们开发并评估了由多个小阵列组成的复合传声器阵列。包括听力测试在内的实验结果表明，我们提出的方法在记录区域的听力位置变化时具有鲁棒性。
