| Title |
A reduction effect of the floor impact sound after installation of the floor and ceiling sound insulation for SMT factory |
| Authors |
Jang Jae-Hee ; Cho Bang-Hyun |
| Abstract |
This study aims to solve the problem of noise and vibration transmitted to adjacent room especially to the downstairs when using SMT(Surface Mount Technology) equipments. To achieve this, a kind of system for preventing noise and vibration was applied, and the effects of sound insulation performance for those alternatives were tested and analyzed.
To reduce floor impact noise, floating floor system using a plastic pallet and rubber was applied. The applied plastic pallet is the size of 30cm wide × 60cm deep × 6cm high and designed to array on a concrete slab, above this plastic pallet, a 14-cm thick concrete was constructed. After installation of this system the floor impact sound was reduced about 7dB(A). For more reduction, a ceiling with a 5-cm thick glass wool and twofold of 0.9-cm thick plywood was constructed at the directly below downstairs. According to this, 4dB(A) was additionally reduced. Based on these results, the design guidelines were suggested to reduce the impact noise generated by using SMT equipment. |