Engineers reduced the size of the apertures in the bulkhead and increased use of sound deadening materials in the dashboard to prevent unwanted noise from entering the cabin. (autonationdrive.com)
To mitigate additional sound from the hybrid drive motors, the RLX Sport Hybrid features additional application of sound deadening materials in the rear passenger floor and trunk floor insulators. (netcarshow.com)
The interior benefits from nicer materials and more sound deadening in addition to upgraded tech. (cnet.com)