Isotropy in decaying reverberant sound fields.
Isotropy in decaying reverberant sound fields.
复制标题
衰减混响声场中的各向同性。
DOI：
10.1121/10.0001769
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Efren Fernandez
中科院分区：
文献类型：
--
作者：
M. Nolan;Marco Berzborn;Efren Fernandez
提出了一种评估衰减混响声场中声场各向同性的方法。所提出的方法扩展了[J.声学。苏克。是。 143(4), 2514-2526 (2018)]并分析了混响室中的衰减声场。获得声场的时空测量，并根据时间进行波数分解，用于检查声场的方向特性及其角对称性。实验结果是在四种不同配置的混响室中获得的（空房间、地板上有吸声器、有面板扩散器和没有面板扩散器）。结果表明，各向同性如何随着时间的变化而增加或减少，具体取决于漫射和吸收元件的布置。研究发现，扩散器可以有效地重新定向房间内的能量，尽管它们不能成功地在样品上产生均匀的入射角。所提出的方法使得分析混响室中发生的特定过程成为可能，并且可以在标准化过程中提供有价值的见解，以验证每个混响室中发现的方向特性。
A method of evaluating sound field isotropy in decaying reverberant sound fields is presented. The proposed method extends the experimental framework outlined in [J. Acoust. Soc. Am. 143(4), 2514-2526 (2018)] and analyzes the decaying sound field in a reverberation room. Spatio-temporal measurements of the sound field are obtained, and a wavenumber decomposition is performed as a function of time, which serves to examine the directional properties of the sound field and its angular symmetry. Experimental results are obtained in a reverberation room in four different configurations (the empty room, with an absorber on the floor, with panel diffusers, and without them). The results demonstrate how isotropy tends to increase or decrease as a function of time, depending on the disposition of the diffusing and absorbing elements. Diffusers are found to effectively redirect the energy in the room, although they do not succeed in generating a uniform incidence on the sample. The proposed approach makes it possible to analyze the specific processes occurring in a reverberation chamber and can provide valuable insights in the process of standardization to verify the directional properties found in each reverberation room.