Technical Note: Comparison of the Sound Insulation of Lightweight Partitions with Different Sound Absorbing Infills

Abstract

Measurements of sound reduction indices for lightweight gypsum board partitions filled with three different sound absorbing materials (rockwool, glasswool and polyurethane foam) are reported. For partitions where the gypsum panels are mounted on a common stud, with the sound absorbing infill in direct contact with both panels and for uncoupled double partitions, measurement results show that polyurethane foam, of high flow resistivity and stiffness, is less effective as an infill than either rockwool or glasswool.

Low-Frequency Sound Proof Cement-Based Syntactic Foam

“…Most of the studies in the literature are focussing on the construction of these materials that usually comprise one or more layers board on each side [1]- [4]. To improve the sound insulation, the installation of sound absorbing materials in the partition cavity was studied [2]. Presently, many researches are being conducted from the viewpoint of constructing the structural design within a building walls, but few have paid attention to enhance the TL by incorporating smart materials.…”

Using sound pressure level and vibration velocity method to determine sound reduction index of lightweight partitions

“…Bravo et al17 2002Performed measurements of SRI for lightweight gypsum board partitions filled with different sound absorbing materials such as Rockwool, polyurethane, and glass wool. It was found that the SRI for the three sound absorbing materials is the same at below 630 Hz, but above this frequency, polyurethane gives lower SRI possible due to its lower absorption coefficient than that of Rockwool and glass wool Sugie et al18 2014Studied the improvement of sound insulation of lightweight double-leaf partition at low frequencies by using several fibrous absorbers with different bulk densities and thicknesses.…”