The reason for this choice, because the sound waves in the transmission process will experience the glass itself, the reflection of the offset, slow down and the absorption process of PVB glue, in theory, each layer of this combination of hard and soft barrier, the sound transmission resistance will be geometric Fold increase, while the frequency of 22HZ ~ 1000HZ in the human voice band but has a good penetration and maintainability. The use of a three-tier laminated glass sound insulation C6, is so the pursuit of romance, the implantation of the boring sound of noise reduction projects, even though it has to pay a greater cost and cost. Dongfeng Citroen C6 fit bmw m52b25 parts for the romantic regardless of the cost of dedication, but also far more than reflected in the choice of glass? In fact, in the choice of interior materials, C6 is also fully taken into account a similar problem: in the center console for the passenger side, it did not use the romantic atmosphere with some flashy peach wood plaque, or plastic and other large area of hard Quality decoration, but very clever use of a whole piece of high-grade punching Chibori NAPPA leather ornaments, which is similar to the listening room sound-absorbing module fit peugeot performance parts. More importantly, this interior design approach, in addition to the functionality with noise reduction, the more a bit more luxurious atmosphere. Romance and luxury, often reflected in the pursuit of the perfect place on the small. It can be said that the high-end acoustic headphones used to do NVH design Dongfeng Citroen C6 gt15 turbo, is to create a sufficient to bring quality to enjoy the car space, and this approach, as many in the cost of the supremacy of the brand, Is definitely not used.