Experimental Study of Structure-Borne Noise Transfer Paths over the Mid-Frequency Regime

This article examines the structure-borne noise transfer path measures by using a laboratory experiment with simulated engine and passenger compartments. It is excited by an emulated powertrain unit that is mounted in the engine room through three hard mounts. Indirect estimation methods for dynamic interfacial forces are first compared with direct measurements over the mid frequency regime. Two alternate path analysis issues, with focus on partial pressures in the receiver room, are then examined. This experimental study clearly demonstrates the strengths and limitations of path rank ordering schemes and analysis methods though only the translational motions are considered.