Brüel & Kjær Sound & Vibration Measurement A/S, Skodsborgvej 307, 2850 Nærum, Denmark.
J Acoust Soc Am. 2011 Oct;130(4):2063-75. doi: 10.1121/1.3628323.
The binaural auralization of a 3D sound field using spherical-harmonics beamforming (SHB) techniques was investigated and compared with the traditional method using a head-and-torso simulator (HATS). The new procedure was verified by comparing simulated room impulse responses with measured ones binaurally. The objective comparisons show that there is good agreement in the frequency range between 0.1 and 6.4 kHz. A listening experiment was performed to validate the SHB method subjectively and to compare it to the HATS method. Two musical excerpts, pop and classical, were used. Subjective responses were collected in two head rotation conditions (fixed and rotating) and six spatial reproduction modes, including phantom mono, stereo, and surround sound. The results show that subjective scales of width, spaciousness, and preference based on the SHB method were similar to those obtained for the HATS method, although the width and spaciousness of the stimuli processed by the SHB method were judged slightly higher than the ones using the HATS method in general. Thus, binaural synthesis using SHB may be a useful tool to reproduce a 3D sound field binaurally, while saving considerably on measurement time because head rotation can be simulated based on a single recording.
使用球谐波束形成 (SHB) 技术对三维声场的双耳声化进行了研究，并与使用头部和躯干模拟器 (HATS) 的传统方法进行了比较。通过双耳比较模拟房间脉冲响应与测量结果，验证了新方法。客观比较表明，在 0.1 到 6.4 kHz 的频率范围内有很好的一致性。进行了听力实验以主观验证 SHB 方法并将其与 HATS 方法进行比较。使用了两个音乐片段，流行音乐和古典音乐。在两种头部旋转条件（固定和旋转）和六种空间再现模式下收集了主观响应，包括幻影单声道、立体声和环绕声。结果表明，基于 SHB 方法的宽度、空间感和偏好的主观尺度与 HATS 方法获得的结果相似，尽管使用 SHB 方法处理的刺激的宽度和空间感通常被判断略高于使用 HATS 方法的刺激。因此，使用 SHB 的双耳合成可能是一种有用的工具，可以在节省大量测量时间的情况下进行三维声场的双耳再现，因为可以基于单个录音模拟头部旋转。
