INSULATOR STRUCTURE OF WALL FOR PREVENTING BOTTOM NOISE, WHICH INSULATES EASILY LOW FREQUENCY SOUND

摘要

PURPOSE: Provided is an insulator structure of the wall for absorbing and preventing bottom noise, which insulates easily low-frequency sound transmitted through concrete wall in an apartment by using membrane vibration. CONSTITUTION: The insulator structure of the wall for preventing bottom noise consists of two expanded ethylene vinyl acetate resins, which are vertically placed against side wall in contact with slab bottom; and a soundproof sheet, which is placed between a first ethylene vinyl acetate resin and a second ethylene vinyl acetate resin to prevent low-frequency waves by membrane vibration. The expanded ethylene vinyl acetate resin has 5-10mm of thickness. The soundproof sheet has 1-2mm of thickness and consists of 80-85wt% mixture of BaSO4 and iron oxides(85wt% BaSO4 and 15wt% iron oxides), 10-15wt% thermoplastic resin(ethylene vinyl acetate resin), and 5-10% other additives.