Browse Publications Technical Papers 2023-01-1083

A Lightweight Multilayer Dissipative Material with High Acoustic Performance 2023-01-1083

A multilayer acoustic treatment constructed of 3M Thinsulate material combined with 3M Flexile Acoustic Material (FAM) achieves a low profile and is lightweight and multi-functional, with properties which are desirable for NVH (noise, vibration and harshness) treatments. 3M (FAM), a dissipative material, consists of microfibers and acoustically active particles; this material was introduced in the last SAE NVH conference. In this paper, the acoustic performance of the multilayer treatment was evaluated by using random incidence absorption and transmission loss measurements, as well as in-vehicle experiments. Absorption and transmission loss were additionally modeled using the transmission matrix method (TMM). In the in-vehicle test, an OEM SUV wheelhouse liner with trim was evaluated utilizing this new multilayer 3M treatment.


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