Title:
SOUNDPROOF BOARD WITH VENTILATION FUNCTION
Document Type and Number:
Japanese Patent JP2019152726
Kind Code:
A
Abstract:
To provide a soundproof material that can ventilate air in air-conditioning facilities and also insulate noise with a simple structure.SOLUTION: The present invention relates to a soundproof plate 10 which has a ventilating function and reduces sound pressure of specific frequency, and the soundproof plate 10 comprises: a flat plate 20 which has an opening 30 for ventilation formed; and a mountain-shaped projection 40 which is formed of two planes 52, 54 on the flat plate 20 on the side of a sound source 60 of sound pressure, the mountain-shaped projection 40 covering the opening 30 of the flat plate 20 and having one of lengths L1, L2 of its mountain shape as long as a multiple of a 1/4 wavelength of the sound pressure of the specific frequency.SELECTED DRAWING: Figure 1
Inventors:
KISAKIBARU TOSHIRO
MOTOHORI ISAO
UESUGI NORIYUKI
IIDA SHOJI
MOTOHORI ISAO
UESUGI NORIYUKI
IIDA SHOJI
Application Number:
JP2018037062A
Publication Date:
September 12, 2019
Filing Date:
March 02, 2018
Export Citation:
Assignee:
KONDO KOGYO KK
NIPPON CAMBRIDGE FILTER KK
NIPPON CAMBRIDGE FILTER KK
International Classes:
G10K11/16; E01F8/00; E04B1/86
Attorney, Agent or Firm:
Yuzo Yamazaki
Toshiaki Akamatsu
Tadao Naito
Chihiro Imai
Toshiaki Akamatsu
Tadao Naito
Chihiro Imai