Changes in Floor Impact Sound Insulation Performance with Time

• Published in: Applied Mechanics and Materials Vol. 752-753; no. Advanced Engineering and Technology; pp. 698 - 701
• Main Authors: Yang, Kwan Seop, Yeon, Jun Oh, Kim, Kyoung Woo
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 20.04.2015
• Subjects: Acoustic insulation; Dynamics; Loads (forces); Reduction; Sound; Stiffness; Vibration; Weight reduction; Long-Term Deformation; Dynamic Stiffness; Resilient Materials; Floor Impact Sound
• ISBN: 3038354422; 9783038354420
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.752-753.698

Floating floor structures installed with resilient materials are commonly used to reduce sound from floor impacts. Resilient materials minimize the transmission of vibrations by absorbing shock vibrations occurring on the upper part. The floor impact sound reduction performance of resilient materials is related to the dynamic stiffness, which is a physical characteristic of materials. However, the dynamic stiffness varies according to the increase in the loading time of the load that is installed on the upper part of resilient materials. The dynamic stiffness values increase with an increase in the loading time; an increased dynamic stiffness value decreases the vibration reduction effect. The present study focuses on a floor structure installed with resilient materials, and identifies the degree of reduction in floor impact sound insulation performance with the elapse of time. The insulation of sound from lightweight impact sound decreased with the elapse of time, whereas the heavyweight impact sound did not show significant changes.