Changes in Floor Impact Sound Insulation Performance with Time

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volumes 752-753)
• Pages: 698-701
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.752-753.698
• Online since: April 2015
• Authors: Kyoung Woo Kim*, Jun Oh Yeon, Kwan Seop Yang
• Keywords: Dynamic Stiffness, Floor Impact Sound, Long-Term Deformation, Resilient Materials

References

[1] L. Cremer, M. Heckel and E.E. Ungar, Structure-Borne Sound. 2nd, Ed, Sprinter-Verlag, Berlin, (1988).

[2] A. Schiavi, A.P. Belli and F. Russo, Estimation of acoustical performance of floating floors from dynamic stiffness of resilient layers, Build. Acoust. 12 (2) (2005) 99-113.

DOI: 10.1260/1351010054037938

[3] ISO 9052-1, Acoustics-determination of dynamic stiffness – part 1: materials used under floating floors in dwellings, (1989).

DOI: 10.3403/00278634u

[4] K.W. Kim, H.J. Choi, K.S. Yang and J.Y. Sohn, A Study on the Change in Dynamic Stiffness of Resilient Materials according to the Load Duration. Proceedings of the First International Conference on Building Energy and Environment, (2008).

[5] ISO 29770, Thermal insulating products for building applications - Determination of thickness for floating-floor insulating products, (2008).

DOI: 10.3403/30259149

[6] K.W. Kim, G.C. Jeong, K.S. Yang and J.Y. Sohn, Correlation between dynamic stiffness of resilient materials and heavyweight impact sound reduction level. Build. Environ. 44 (2009) 1589-1600.

DOI: 10.1016/j.buildenv.2008.10.005