Alternative vibroacoustic methods for measuring airborne sound insulation

The uncertainty in airborne sound insulation testing is high, as is well documented by interlaboratory studies, despite decades of effort. Some of this uncertainty may be inherent in the reverberation room test method, and improved evaluation of the airborne sound insulation of assemblies may be attainable using vibration measurements. The authors have begun an investigation of using vibroacoustic test methods to evaluate airborne sound insulation of wall assemblies. The goal is to develop a measurement method with an improved measurement uncertainty that may complement existing test methods. Additional measurements and analysis are presented.