Opel Ampera

Opel Ampera

The main source of noise in a car is the engine. With an electric car there is no engine noise and car manufacturers put some extra effort in making the interior of the car as quiet as possible. So much that the Ampera is almost as quiet as the C6 after deadening.

The Ampera has an electric range of 40 to 80km on one charge, after that a 1.4 liter petrol engine extends the range up to 500km.

In electric only mode is whisper quiet, only with some wind and rolling noise present. The petrol engine is only intrusive when accelerating hard. A very good start to what could be my quietest car so far.

Revisiting the front doors again

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

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

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

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

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 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

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

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

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.
Engine compartment

Engine compartment

Deadening the engine compartment, where else would you start on an electric car, right?
Deadening an electric car

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.