VIBRATION AND LOW-FREQUENCY IMPACT SOUND GENERATED BY NORMAL HUMAN WALKING IN LIGHTWEIGHT WOOD-JOISTED FLOOR-CEILING ASSEMBLIES

摘要

Human walking generates vibrations and impact sound in lightweight wood foisted floor-ceiling assemblies. Design methods have been developed to successfully control the perceptible vibrations and construction solutions or materials help to reduce high frequency impact sound transmission, but not low-frequency footstep noise. This paper presents two cases of unsatisfactory low-frequency footstep noise transmission in wood-framed floor-ceiling assemblies and discusses about limited remedies available.