Characteristics of Transmission of Floor Vibration and Floor Impact Noise Due to Human Activities

Abstract

Noise complaints among neighbors in apartment building are mainly caused by floor impact noise that is structure born noise due to occupant induced floor vibration. To control this noise problems many researchers have investigated floor systems and finishing materials. Light-weight impact noise affects by finishing materials, but heavy-weight impact noise induced by heel impacts during normal walking or jumping of children is concerned with structural system and floor vibration. To figure out the characteristics of floor impact noise and transmission of floor vibration due to human activities, vibration tests were conducted in apartment buildings. Impact hammer, heel drop and walking activities were loaded at center of upstairs living room, and accelerations of slabs for both upstairs and downstairs and sound pressure levels for downstairs were measured. The acceleration ratio of transmitted floor vibration to downstairs and human induced vibration in upstairs was between 0.5 and 1.0 according to slab size, wall, and load type. And floor impact noise occurred in the range of natural frequency of slab.

Vibration Influence on Structural Perspectives According to Pedestrian Traffic Type of Pedestrian Bridge

“…국내에서는 1990년대부터 인체의 진동 영향에 관한 연구 결과가 발표되기 시작하였다. Lee (1992)는 진동이 인체에 미치는 영향이라는 연구를 통해 주파수, 진동 축 그리고 진동 지속시간에 대해 인체가 어떻게 반응하는지 분석하였 다. KICT (2000)에서는 교량의 진동⋅처짐에 대한 평가 절차 수립에 관한 연구를 수행하였다.…”