592 - A study on floor impact noise
Kim H., Kim B., Cha S., Kim Y.
Abstract
In this paper, floor impact noise reduction by using floating floor is studied. A mock-up simulating ship cabin is built by using 6 mm steel plate, and two identical cabins are made where 25 mm sandwich panel is used to construct wall and ceiling inside the steel structure. Various floating floor systems including VL (Viscoelastic layer), mineral wools, and steel plates are tested for which normalized impact noise is measured according to ISO 140-7. In addition, floor SBN (Structure-borne Noise) and floor damping are measured to study the effect of floating floor structure. It is found that the effect of VL is negligible when it is used between steel deck and mineral wool, since most vibration absorption occurs in the mineral wool. The direction of the mineral wool fiber affects floor impact noise significantly, in which horizontal direction is quieter than vertical direction by 5 – 7 dB.
Citation
Kim H.; Kim B.; Cha S.; Kim Y.: A study on floor impact noise, CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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