公开(公告)号：US20230257992A1

公开(公告)日：2023-08-17

申请号：US18014373

申请日：2021-09-17

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Wonju JEON ,  Hyeonbin RYOO

IPC: E04B1/86 ,  G10K11/172

CPC classification number: E04B1/86 ,  G10K11/172 ,  G10K2210/3214

Abstract: A sound absorbing device according to an exemplary embodiment of the present invention comprises a plurality of sound absorbing cells arranged adjacent to each other on a plane, and each of the plurality of sound absorbing cells includes: a chamber having a volume therein, and in which a plurality of micro holes is perforated on a front surface in which a sound wave is incident; and a neck part introduced and extended to a rear of the front surface and penetrated by a through hole for communicating the outside and the chamber.

公开(公告)号：US20250157448A1

公开(公告)日：2025-05-15

申请号：US18725583

申请日：2022-11-30

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Wonju JEON ,  Hyeonbin RYOO ,  Jiwan KIM

IPC: G10K11/172

Abstract: The present invention relates to a broadband sound absorption device using area division, the device comprising: Helmholtz resonators including a neck portion and a cavity portion connected to the neck portion and having a predetermined area and thickness; and a unit sound absorber including at least one pair of the Helmholtz resonators, wherein a plurality of unit absorbers are arranged on a plane or curved surface, and the plurality of sound unit absorbers are formed to have cavity portions with different areas to minimize the thickness while enabling sound absorption for a wider band.

公开(公告)号：US20200333643A1

公开(公告)日：2020-10-22

申请号：US16850235

申请日：2020-04-16

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Wonju JEON ,  Junyong AN ,  Hyeonbin RYOO

IPC: G02F1/11 ,  G02F1/33

Abstract: An acousto-optic structure according to an exemplary embodiment of the present invention is a stacked structure for inducing an interaction between incident acoustic wave and incident optical wave, and it includes: a pair of multi-layered structures including a structure in which two layers with different acoustic impedance and optical impedance are alternately arranged in a direction in which the acoustic wave and the optical wave propagate; and a cavity layer disposed between the pair of multi-layered structures in the direction in which the acoustic wave and the optical wave propagate, and made of a medium having acoustic impedance and optical impedance that are different from those of interfacing layers at both sides, wherein the two layers are symmetrically arranged with respect to the cavity layer so that the acoustic wave and the optical wave may be confined in the cavity layer.