This videos are all about how to reduce cabin noise / sound and vibration inside car cabin , there are various methods of noise and vibration reduction inside a car cabin like damping but we are going to focus on the methods from basic to complex or we can say more important to less important .
in this video we lubricated the hydraulic engine mount to reduce the engine vibrations (engine noise )which gets translated to noise inside the cabin , as noise is the side effect of vibration , so the very first step to reduce noise is to reduce the vibrations first .
more of a problem in diesel cars than petrol
video 1 - [ Ссылка ]
video 2 - [ Ссылка ]
secondly , another source of noise is either road noise or tyre noise or both
in this video we dumped the manufacturer's sound insulation , which was on the backside of inner fender liner and replaced it with thermo - acoustic blanket , which acts like damping sheet which we usually use in audio application but a lot lighter than traditional damping sheet . so we applied one layer of blanket on the backside of inner fender liner , covered almost 60% of the fender liner , whereas it was just 10% covered from factory.
Its the second video of this series first video was on engine mount lubrication to decrease the vibration transfer to the cabin
in video 3 we have covered the outer side of cowl top ( which is inside engine bay ) . firstly removed the original sound insulation material from the front firewall , added one layer of thermo-acoustic insulation on the firewall and on top of than placed the original insulation material provided by manufacturer on top of that , so we will have 2 layers of sound insulation .
DAMPING SHEET - [ Ссылка ]
