METALLIC THIN PLATE STRUCTURAL BODY EXCELLENT IN ACOUSTIC DAMPING CHARACTERISTIC

摘要

PROBLEM TO BE SOLVED: To lower a sound pressure level in simple structure and to speedily damp echoing sound peculiar to metallic sound generated in striking a metallic thin plate structural body. SOLUTION: A flat plate type or box type structural body is constituted of a metallic thin plate outer plate and a beam to reinforce it. Additionally, it is constituted so that the beam 2 makes contact with one surface of the metallic thin plate outer plate 1 brough an acoustic damping sheet 3, and a connection state of the acoustic damping sheet 3 and the metallic thin plate outer plate l or the reinforcing beam 2 is made to be in an unconnected state or in a discrete connected state at least on one surface of the acoustic damping sheet 3.