Is Underbody Soundproofing Really Effective?
1 Answers
Effectiveness is certainly present, but not significant. Nowadays, the floor of new cars leaving the factory is generally treated with a layer of original vibration-damping material in certain areas. This means manufacturers recognize that noise in small to medium-displacement vehicles is a significant issue, so they perform some vibration damping on specific points of the floor before the cars leave the factory. However, for achieving good soundproofing results, this minimal vibration damping hardly makes a substantial difference. Therefore, further soundproofing treatment on the car floor is definitely necessary. A. Low-frequency noise, engine noise, and tire noise, which are highly penetrating, manifest through the car floor and are the primary forms of automotive noise, significantly affecting driving comfort. B. Vibration deformation: Low-frequency vibrations are highly destructive and are the main cause of metal fatigue in the car floor. C. Hole leakage: Noise, heat, exhaust fumes, and dust can enter the cabin through holes in the car floor, increasing vehicle noise, air conditioning energy consumption, and deteriorating cabin air quality, severely impacting driving comfort. D. Heat energy loss: The car floor is the main pathway for heat from the engine and exhaust pipe to transfer into the cabin. Without control, this can significantly consume the efficiency of the car's air conditioning. The role of floor soundproofing: Applying vibration-damping strips and soundproofing cotton to the car floor effectively absorbs any vibrations and blocks a substantial amount of heat. The focus of floor construction is to address engine and road chassis noise, not only efficiently isolating low-frequency noise but also greatly reducing heat transfer from the engine and exhaust pipe into the cabin.
