BLAST SOUND REDUCTION DEVICE - SHIMIZU CONSTRUCTION CO LTD

Title:

BLAST SOUND REDUCTION DEVICE

Document Type and Number:

Japanese Patent JP2023035460

Kind Code:

A

Abstract:

To provide a blast sound reduction device which can be easily prepared and easily secures a space on a work surface.SOLUTION: A blast sound reduction device 101 comprises a plurality of paper tubes 111-1 arranged in a direction intersecting with a J111 direction and a lid 160 blocking an opening of an end surface 122 of the tube 111-1. A hollow part 112 has a volume generating Helmholtz resonance to the blast sound.SELECTED DRAWING: Figure 2

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Inventors:

UNO MASATOSHI
MIYASE FUMIHIRO
TANIGAWA MASAKI
NAKAJIMA TOSHIHIDE
SHIONO JUN
SATO SO

Application Number:

JP2021142326A

Publication Date:

March 13, 2023

Filing Date:

September 01, 2021

Export Citation:

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Assignee:

SHIMIZU CONSTRUCTION CO LTD
OJI HOLDINGS CORP

International Classes:

E21F17/103; E21D9/00; G10K11/16; G10K11/172

Attorney, Agent or Firm:

Yasushi Matsunuma
Kenichi Kawabuchi
Kazuzumi Nishizawa

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