The wave transport properties of two-dimensional stealthy hyperuniform distributions of rigid scatterers embedded in a waveguide are experimentally characterized for scalar waves in airborne audible acoustics. The nonresonant nature of the scatterers allows us to directly link these properties to the geometric distribution of points through the structure factor. The transport properties are analyzed as a function of the stealthiness $\chi$ of their hyperuniform point pattern and compared to those of a disordered material in the diffusive regime, which are characterized by the Ohm's law through both the classical mean free path and the corrected mean free path by the collective approximation considering the effects of correlation. Different scattering regimes are theoretically and numerically identified showing transparent regions, isotropic band gaps, and anisotropic scattering depending on $\chi$. The robustness of these scattering regimes to losses, which are unavoidable in audible acoustics is experimentally unveiled.

中文翻译：

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可听声学刚性散射体超均匀分布的实验表征

嵌入波导中的刚性散射体的二维隐形超均匀分布的波传输特性在机载可听声学中针对标量波进行了实验表征。散射体的非共振性质使我们能够通过结构因子直接将这些属性与点的几何分布联系起来。传输特性被分析为隐身性的函数$\chi$他们的超均匀点图案，并与扩散状态中的无序材料进行比较，其特征在于通过经典平均自由程和通过考虑相关效应的集体近似得到的校正平均自由程的欧姆定律。在理论上和数值上确定了不同的散射方案，显示透明区域、各向同性带隙和各向异性散射，具体取决于$\chi$. 这些散射机制对损失的鲁棒性在可听声学中是不可避免的，通过实验揭示了这一点。