Title:
SOUND INSULATION DEVICE USING CRUSHED GRAIN
Document Type and Number:
Japanese Patent JP3297002
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a simple structure having a high sound insulation effect on noise in which a sound having different nature is mixed.
SOLUTION: A sound insulation device comprises a screen 2 through which a sound is advanced; and a crushed grain layer 4 effecting irregular reflection of a sound advanced through the screen 2 and formed of crushed grains, such as glass, having a number of faces on a surface. Since a sound is advanced as it effects irregular reflection by crushed grains, energy of a sound is gradually decreased, whereby a sound insulation effect is high. Since the crushed grains are formed by crushing waste, such as empty glass bottles and porcelain, and structure is simple, manufacturing is effected at a low cost.
Inventors:
Kazuhiro Nishii
Application Number:
JP24979597A
Publication Date:
July 02, 2002
Filing Date:
August 29, 1997
Export Citation:
Assignee:
Kazuhiro Nishii
International Classes:
E01F8/00; E01F8/02; G10K11/16; G10K11/162; (IPC1-7): E01F8/00; E01F8/02
Domestic Patent References:
| JP6240620A | ||||
| JP8314468A | ||||
| JP542766B2 | ||||
| JP527652B2 | ||||
| JP5239521B2 |
Attorney, Agent or Firm:
Hidetoshi Kasahara (1 person outside)