Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, N284 Eyring Science Center, Provo, Utah 84602, USA.
J Acoust Soc Am. 2021 Mar;149(3):1507. doi: 10.1121/10.0003363.
Although human speech radiation has been a subject of considerable interest for decades, researchers have not previously measured its directivity over a complete sphere with high spatial and spectral resolution using live phonetically balanced passages. The research reported in this paper addresses this deficiency by employing a multiple-capture transfer function technique and spherical harmonic expansions. The work involved eight subjects and 2522 unique sampling positions over a 1.22 or 1.83 m sphere with 5° polar and azimuthal-angle increments. The paper explains the methods and directs readers to archived results for further exploration, modeling, and speech simulation in acoustical environments. Comparisons of the results to those of a KEMAR head-and-torso simulator, lower-resolution single-capture measurements, other authors' work, and basic symmetry expectations all substantiate their validity. The completeness and high resolution of the measurements offer insights into spherical speech directivity patterns that will aid researchers in the speech sciences, architectural acoustics, audio, and communications.
尽管人类语音辐射已经成为几十年来相当感兴趣的课题，但研究人员以前从未使用经过语音平衡的真实话语，以高空间和频谱分辨率在完整球面上测量其指向性。本文通过采用多捕获传递函数技术和球谐展开来解决这一不足。该工作涉及 8 名受试者和 2522 个独特的采样位置，覆盖 1.22 或 1.83 米的球体，极角和方位角增量为 5°。本文解释了方法，并为进一步在声学环境中进行探索、建模和语音模拟提供了存档结果的链接。将结果与 KEMAR 头和躯干模拟器、较低分辨率的单捕获测量、其他作者的工作以及基本的对称性预期进行比较，都证实了它们的有效性。测量的完整性和高分辨率提供了对球形语音指向性模式的深入了解，这将有助于语音科学、建筑声学、音频和通信领域的研究人员。
