公开(公告)号：US20210049995A1

公开(公告)日：2021-02-18

申请号：US16978879

申请日：2019-02-19

申请人： KOREA INSTITUTE OF MACHINERY & MATERIALS

发明人： Kyungjun SONG ,  Shin HUR ,  Duck Gyu LEE ,  Eun Joong LEE

IPC分类号： G10K11/32

摘要： A directional sound apparatus includes a planar shape plate and a sound wave generator. The planar shape plate has a plurality of grooves formed on a surface of the planar shape plate. The sound wave generator is configured to radiate a sound wave to outside from the surface of the planar shape plate. A width of each of the grooves and a distance between the grooves adjacent to each other are smaller than a wavelength of the sound wave. The planar shape plate has a plurality of cell areas in which at least one groove is included. A structure of the groove included in a first cell area is different from that of the groove included in a second cell area adjacent to the first cell area, so that surface admittance in the first cell area is different from that in the second cell area.

公开(公告)号：US20170069303A1

公开(公告)日：2017-03-09

申请号：US15121985

申请日：2014-07-28

申请人： KOREA INSTITUTE OF MACHINERY & MATERIALS

发明人： Kyungjun SONG ,  Shin HUR ,  Youngdo JUNG ,  Seong-Hyun LEE ,  Jedo KIM

IPC分类号： G10K11/08 ,  G10K11/26

CPC分类号： G10K11/08 ,  G10K11/22 ,  G10K11/26 ,  H04R1/345

摘要： A sound wave metamaterial amplifies a sound wave, and includes a plate. The plate has a plurality of sound wave guides passing through both surfaces of the plate and having a predetermined pattern. The sound wave guides are spaced apart from each other by a predetermined distance and face each other, with respect to a central point, a central axis or a central surface.

摘要翻译： 声波超材料放大声波，并包括一个板。 板具有穿过板的两个表面并具有预定图案的多个声波引导件。 声波引导件相对于中心点，中心轴线或中心表面彼此隔开预定距离并面对彼此。

公开(公告)号：US20220013711A1

公开(公告)日：2022-01-13

申请号：US17294672

申请日：2019-11-04

申请人： KOREA INSTITUTE OF MACHINERY & MATERIALS ,  INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY

发明人： Shin HUR ,  Kyungjun SONG ,  Gilho YOON ,  Hyunggyu CHOI

IPC分类号： H01L41/25 ,  H01L41/047 ,  H01L41/053 ,  H01L41/09

摘要： A method for designing a piezoelectric element unit, a ultrasonic element having the piezoelectric element manufactured using the method, a method for manufacturing the ultrasonic element, and an acoustic pressure focusing device having the ultrasonic element are provided. In the method for designing a piezoelectric element unit, a target position and a target distance are selected. A basic information of a piezoelectric element base material is inputted. Each of a plurality of grids is grouped into a unit grid group. A size of an output acoustic pressure outputted at each unit grid group is calculated. The unit grid group outputting the output acoustic pressure included in a range of a reference acoustic pressure among a plurality of the unit groups is decided. The plurality of ring patterns being concentric is determined based on a pattern shape information.