Title:
SOUND AMPLIFICATION BLOCK MADE OF AIR-PERMEABLE MATERIAL AND AIR-ADSORBING MATERIAL AND HAVING LAYERED STRUCTURE, AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/113559
Kind Code:
A1
Abstract:
An embodiment relates to a sound amplification block that is made of an air-permeable material and an air-adsorbing material and has a layered structure, and a manufacturing method therefor. Provided in an embodiment is a sound amplification block that is made of an air-permeable material and an air-adsorbing material and has a layered structure, characterized by comprising: porous grains made of a first porous material, which is an air-adsorbing material for amplifying sound, a second porous material, which is an air-permeable material and has a greater pore size and porosity than the first porous material, and a binder; and structural gaps formed between the porous grains during the freezing process thereof.
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Inventors:
OH YONG-HEE (KR)
LIM JAE-HWA (KR)
LIM JAE-HWA (KR)
Application Number:
PCT/KR2022/020642
Publication Date:
June 22, 2023
Filing Date:
December 16, 2022
Export Citation:
Assignee:
EM TECH CO LTD (KR)
International Classes:
H04R1/28; C08J9/00; H04R1/02
Foreign References:
| US20190058935A1 | 2019-02-21 | |||
| KR20200072506A | 2020-06-22 | |||
| KR20130038701A | 2013-04-18 | |||
| KR20070119648A | 2007-12-20 | |||
| JP2012222673A | 2012-11-12 |
Attorney, Agent or Firm:
LEE, Kwang-yeon (KR)
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