Revisiting the front doors again
Since the MLV was not covering the entire door and I still had some Dynamat Extreme and Dodo Super Liner I went for almost full coverage of the outer door skin
Taking care of the floor to reduce rolling noise
Deadening the floor made a huge difference in reducing rolling noise and floor vibrations. Not only does the Ampera sound quieter, it also feels more comfortable to ride in.
Deadening on the roof
Blocking wind noise and heat. The Ampera is now as silent at 120km/h as a stock Ampera at 80km/h. A great result, now under 60dB at 120km/h.
Rear hatch door
The rear hatch on the Ampera / Volt doesn't have much space for deadening. Still I tried to reduce noise from the rain and block heat from the summer sun.
Boot and floor under the rear seats
The boot (or trunk) is the noisiest area in a car, especially in an hatchback like the Ampera. So I added Dynamat Extreme, Dodo Super Liner and Dodo Barrier MLV for a 1dB noise reduction.
Deadening on the pillars
Deadening the A, B and C pillars of a car is getting trickier with all the airbags and electric cables. Space is at a premium in modern cars on these areas.
Rear doors and front doors revisited
Just like the front doors, the rear doors got the deadening treatment with Dynamat and Dodo MLV. I also revisited the front doors to add Dodo Super Liner to improve sound quality.
Front doors with MLV
Dynamat, Dodo MLV and Super Liner were added to the front doors of the Ampera and it is now very quiet in traffic and at speed on the highway. The doors feel solid and close with a satisfying thump.
Reducing noise with the VoltShelf
Noise reduction isn't limited to adding Dynamat or other type of materials. Sometimes creating barriers with something as simple as a parcel shelf will also have some effect in making the interior of the car quieter.
Deadening the engine compartment, where else would you start on an electric car, right?
Deadening an electric car
The Ampera is already very quiet as is. Being an electric car brings new challenges on what to deaden and what methods and products to use.