Hatchback owners Nissan Note second generation (E12 body) often face the problem of insufficient acoustic comfort. Designed with an emphasis on efficiency and compactness, the car features thin sheet metal and minimal factory vibration isolation, making highway driving an ordeal for the ears.
Reducing the noise level in this car is a feasible task, but requires a systematic approach. You have to not just stick a couple of pieces of material, but carry out competent vibroacoustic treatment key areas of the body. Properly done work will allow you to enjoy music, conversations and silence even at high speeds.
Why is Nissan Note E12 so noisy and what to do about it
The main reason for the high noise level in Nissan Note E12 lies in the body design and materials used. The factory manufacturer saved on vibration-damping mastics, leaving bare metal on the doors, floor and arches. This leads to the fact that when driving on uneven roads, the metal begins to resonate, increasing the low-frequency hum.
In addition, the aerodynamic shape of the hatchback contributes to the appearance of wind whistling in the area of the mirrors and windshield pillars. The cabin does not have sufficient sound insulation from the external environment, so tire and engine noise penetrates inside almost unimpeded. Vibration isolation will help eliminate resonance, and sound insulation (sound absorption) - block the penetration of sound waves.
It is necessary to understand that complete processing requires disassembling the interior. However, the result justifies the effort: the car becomes more “collected” on the road, the rattling of plastic disappears and the sound quality of the audio system is significantly improved.
Selection of materials and calculation of coating thickness
For high-quality work, you will need specialized materials: vibration dampers based on bitumen or aluminum, sound absorbers with felt or synthetic impregnation, as well as mastics for sealing. It is important not to overload the car with excess weight, so Nissan Note E12 materials of optimal thickness should be selected.
The table below shows the recommended parameters for different areas of the car so that you can create an estimate and work plan:
| Processing area | Vibration isolation (mm) | Sound insulation (mm) | Features |
|---|---|---|---|
| Doors | 2-3 mm | 3-4 mm | Mandatory sealing of process holes |
| Floor and tunnel | 3-4 mm | 5-8 mm | High load, maximum density required |
| Roof | 2 mm | 4-6 mm | Pay attention to weight so as not to overload the center of gravity |
| Wheel arches | 3-4 mm | 4-5 mm | Use mastics to protect against gravel |
| Trunk and lid | 2-3 mm | 3-4 mm | Sealing cracks in the rear compartment |
Using too thick layers on the ceiling can lead to sagging of the cladding, so here it is better to limit yourself to a thin but high-quality vibration damper. For the floor, on the contrary, it is worth using a multi-layer structure to block noise from the engine and exhaust system.
⚠️ Attention: Do not skimp on the adhesive layer. Cheap materials often have poor adhesion, which can lead to vibration detachment in the hot sun in the summer, especially in the area of the floor and engine shield.
Preparing the interior and dismantling the trim
Before starting work, you must carefully prepare the car. Remove all personal items, rugs and objects that may interfere with the process. You will need a set of keys, screwdrivers and special plastic spatulas for removing the clips so as not to break the fragile plastic of the interior Nissan Note E12.
Dismantling the door and floor trim is a critical step. Be extremely careful with the fasteners. If the clips break, they must be replaced, otherwise unpleasant creaks and gaps will appear. Also disconnect the battery before working on electrical components.
After removing the casing, thoroughly clean the metal surface from dust, dirt and factory mastic residues. Use a degreaser based on white spirit or a special solvent. Degreasing - this is a key step, without which no vibration isolation will last long.
☑️ Preparation for sound insulation
Door processing: from resonance to sealing
Doors in Nissan Note E12 - This is the first line of defense against wind and road noise. The treatment technology involves applying a layer of vibration damper to the inner metal door panel, and then installing a sound absorber on the outer skin.
Pay special attention to technological holes. They must be completely sealed with vibration insulation, creating a “glass” for the speaker. This will dramatically improve the sound of the audio system and eliminate glass vibration. Be sure to leave access to the drainage holes at the bottom of the door, otherwise water will get inside.
After installing the vibration and noise, be sure to glue the rubber seals. This will create a sealed circuit that will prevent wind whistling at high speeds. Use materials with a foil layer for better reflection of heat and sound.
- Tire noise
- Engine hum
- Wind whistling
- Plastic rattling
Floor and arches: combating road noise
The most difficult and time-consuming part of the work is processing the floor. This is where the main flow of noise from the asphalt and the exhaust system is concentrated. It is necessary to remove the seats, the central tunnel and completely empty the interior down to the metal.
A thick layer of vibration damper is applied to the floor in two layers or one layer of high-density material. This will reduce vibration of the metal bottom. A layer of sound absorber with thick pile or foam material is laid on top, which will dampen residual sound waves.
The outside of the wheel arches are treated with bitumen mastics or special liquid fender liners that protect the metal from corrosion and gravel. The inside of the arches is sealed with vibration and noise to reduce the noise passing through the suspension.
⚠️ Attention: When treating the floor under carpet, make sure that the material does not block access to the drainage holes in the lower part of the body. Stagnation of water will lead to rapid rotting of the metal.
Ceiling and trunk: the final stage
Roof treatment in Nissan Note E12 requires caution. The metal here is quite thin, so use lightweight materials no more than 2 mm thick. The main task is to eliminate the sound of metal in the rain and reduce wind noise.
The trunk and trunk lid also need treatment. The sound of rocks hitting metal, squeaking plastic and noise from the rear suspension can be very annoying. Cover the metal parts of the trunk roof with vibration insulation, and the plastic elements with sound absorber.
Don't forget about the gaps in the rear where the body panels meet. Sealing these joints with butyl tape or a special sealant will eliminate noise penetration from under the hood and from the exhaust system.
Proper sealing of technological openings in the doors and trunk provides up to 30% improvement in acoustic comfort without increasing the thickness of the materials.
Hidden nuances of working with plastic
The plastic on the Nissan Note E12 is quite fragile at low temperatures. If you are doing soundproofing in winter, be sure to warm up the installation sites of the clips and the elements themselves with a hairdryer before installation to avoid cracks.
FAQ: Frequently asked questions about sound insulation Nissan Note E12
How long does it take to complete soundproofing?
The complete interior treatment process, including disassembly and reassembly, takes 2 to 4 days if working alone. If you only do the doors and floor, you can do it in one day.
Do the seats need to be removed to treat the floor?
Yes, for high-quality processing of the floor and tunnel, it is necessary to completely remove the front and rear seats, as well as remove the central tunnel to get to the metal.
Will the car's dynamics decrease after soundproofing?
The weight of the car will increase by approximately 30-50 kg depending on the thickness of the materials. This may slightly affect acceleration, but for city driving the difference is almost unnoticeable.
Is it possible to do soundproofing yourself?
Yes, it is quite possible to do it yourself if you have basic tool skills and patience. The main thing is not to rush at the stage of degreasing and rolling with a roller.