바닥충격에 의한 공동주택의 바닥, 벽, 천장의 진동 및 소음방사특성 연구

Evaluating the Vibrational Characteristics of Floor Impact Noise in Different Structural Elements of an Apartment House

The overall noise reduction was compared in regard to the vibrational characteristics of floor impact noise in a multi story residential building which has several noise reduction treatments. The vibration through its structural elements such as wall, floor and ceiling and sound emitting were investigated for each insulation treatment. It was found that, in case of heavy-weight impact noise, the vibration energy is emitted mostly from ceiling, but for the light-weight impact noise, most of the energy comes through ceiling and walls. That is, the vibration of a ceiling is the main factor that determines the frequency characteristics of the transmitting noise to lower floors.