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    • 6. 发明申请
    • ACOUSTIC LENS USING EXTRAORDINARY ACOUSTIC TRANSMISSION
    • 使用特殊声音传输的声学镜头
    • US20160111080A1
    • 2016-04-21
    • US14739993
    • 2015-06-15
    • WILLIAM M. ROBERTSON
    • WILLIAM M. ROBERTSON
    • G10K11/30G10K11/32G10K11/04
    • G10K11/30G10K11/04G10K11/32
    • An acoustic lens or diffractive acoustic device, including but not limited to, a sub-wavelength thickness lens or diffuser, comprising an array of Helmholtz resonators (HRs) that provide perfect or near-perfect sound transmission through a rigid barrier. HRs are arranged in a line or an array confined within a waveguide and oriented so that one neck protrudes onto each side of the barrier. Extraordinary acoustic transmission (EAT) occurs when radiation (such as EM or acoustic radiation) incident on the barrier perforated with sub-wavelength holes is transmitted at a rate higher than expected based on the areal coverage fraction of the holes. Transmission is independent of the direction of sound on the barrier and the relative placement of the necks.
    • 声透镜或衍射声学装置,包括但不限于亚波长厚度透镜或漫射器,其包括通过刚性屏障提供完美或接近完美的声音传播的亥姆霍兹共振器(HR)阵列。 HR被布置在限制在波导内的线或阵列中并且被定向成使得一个颈部突出到屏障的每一侧上。 当基于孔的面积覆盖率以高于预期的速率传输入射在穿过亚波长孔的屏障上的辐射(例如EM或声辐射)时,发生非常声传播(EAT)。 传播与屏障上的声音方向和颈部的相对位置无关。