USE OF A SOUND ABSORBING SUBSTRATE AS AN UNDERLAYER IN A FLOORING STRUCTURE

摘要

A sound absorbing substrate for use as an underlayer in a flooring structure including a subfloor. The substrate is made of a resilient material and more particularly of recycled tires and comprises a bottom surface sized to cover a given surface area. This bottom surface is provided with cavities that preferably consist of parallel grooves extending at an angle of about 45° with respect to one side edge of the substrate. These cavities leave a portion only of the bottom surface in contact with the subfloor. The surface ratio of the portion of bottom surface in contact with the subfloor to the given surface area covered by the bottom surface ranges from 20 to 65%. Such substrates can be of reduced thickness while still having good sound absorbing properties.