Mass Timber Acoustics Design: A Solved Challenge?

摘要

While laboratory measurements of the impact and airborne sound isolation of traditional building assemblies are widely available, few publicly available resources quantify and catalog the acoustic performance of mass timber assemblies, including cross-laminated timber (CLT) and nail-laminated timber (NLT) systems. Adding to the challenge, mass timber assemblies are typically much lighter in weight than assemblies of other materials of similar thickness. To assist in the acoustical design of successful mass timber projects, Woodworks has worked with a number of acoustical product manufacturers over the past several years, and has commissioned a number of lab and field acoustics tests of mass timber assemblies. Using the experience and data gained through this work, we recently published an inventory of acoustically-tested mass timber assemblies, which currently includes over 450 tested systems. This paper will review options for mass timber floor/ceiling and wall assemblies, lessons learned through project design and testing, and tips for detailing to avoid flanking paths in mass timber structures. It will also look ahead, positing future trends for the increased use of mass timber in taller mixed-use and multi-family buildings.