超均匀无序参数化扬声器阵列
Hyperuniform disordered parametric loudspeaker array
AI总结：
本文提出用超均匀无序阵列替代周期性分布，以抑制参数化扬声器阵列的栅瓣并保持窄主瓣，同时该阵列可复制，便于超大型阵列设计。
摘要：
可转向参数化扬声器阵列以其方向性和窄波束宽度而著称。然而，由于周期性阵列分布，它常常受到栅瓣的影响。在此，我们提出将超均匀无序的阵列配置作为相控阵中声学天线的一种有前景的替代分布，该配置在短程上随机而在大尺度上相关。角度分辨测量表明，所提出的阵列抑制了栅瓣，并在主瓣附近为基频波保持了最小的辐射区域。这些独特的发射特性有利于二次频率波在消除栅瓣时不受基波频率的影响。除此之外，超均匀无序阵列是可复制的，这有助于在不增加任何额外计算工作量的情况下设计超大型阵列。
英文摘要：
A steerable parametric loudspeaker array is known for its directivity and narrow beam width. However, it often suffers from the grating lobes due to periodic array distributions. Here we propose the array configuration of hyperuniform disorder, which is short-range random while correlated at large scales, as a promising alternative distribution of acoustic antennas in phased arrays. Angle-resolved measurements reveal that the proposed array suppresses grating lobes and maintains a minimal radiation region in the vicinity of the main lobe for the primary frequency waves. These distinctive emission features benefit the secondary frequency wave in canceling the grating lobes regardless of the frequencies of the primary waves. Besides that, the hyperuniform disordered array is duplicatable, which facilitates extra-large array design without any additional computational efforts.
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