No.2（1999）10.Reduction of floorimpactnoise using a recycledpaperboarddamper

Shoichi TAKADA, Masataka SAMITSU, Takashi IMAI, Masao HOZUMI, Kokichi KATO and Satoshi OSHIMA

A Recycled-Paperboard-Damper (RPD)is a constrained-layer-type vibration-damping material composed of recycled paperboards pasted to each other using viscoelastic adhesive. In this research, RPD had been applied to floor plywood and ceiling gypsum boards for a wooden two-story model-house. With damped floor and ceiling, light impact floor noise is reduced 10dB for octave-band 500Hz, and air-borne noise is reduced 4dB. In that case, damped floor and ceiling have the same thickness and area density as non-damped ones. Acceleration of the ceiling, sound pressure level of the ceiling-reverse-side, and so on, are measured as well. Using such information, the vibration and sound transmission mechanism, and the effective application method of RPD is considered.

Keywords
Recycled Paper, Damping, Vibration Damping, Damping materials, Damping of Panels, Floor Impact Noise, Gypsum Board, Plywood.

Back to Contents