What are the methods to deal with noise inside the car?
2 Answers
Methods to deal with noise inside the car include: 1. Pasting sound-absorbing foam material under the engine hood; 2. Installing sound-absorbing cotton material on the trunk, the bottom of the trunk, and the wheel arches on both sides of the trunk; 3. Installing sealing strips inside the car doors; 4. Installing professional damping plates in areas prone to noise; 5. Replacing tires. The causes of noise inside the car are: 1. Carbon deposits in the engine; 2. Damper failure; 3. Large gaps in the cabin or vehicle; 4. Tire aging; 5. Internal damage to the valve guide; 6. Cooling system failure; 7. Poor quality engine oil; 8. Engine misfire; 9. Carbon deposits in the spark plugs.
Last time on the highway, I noticed wind noise leaking through the doors, and it took a while to fix the cabin noise. The most common types are wind noise and tire noise: if the door seals are aging, just apply some D-shaped adhesive strips—it costs around a hundred bucks to fix the air leaks. If tire noise is loud, don’t rush to replace the tires; first check if the tire pressure is correct. Here’s a little trick—stuff the spare tire compartment in the trunk with soundproofing foam, and low-frequency humming can be reduced by half. If there’s rattling in the dashboard, it’s a bit more troublesome—you’ll need to disassemble it and add anti-vibration foam. Finally, a reminder: don’t waste money on full-car soundproofing. Effective soundproofing requires removing seats and door panels, and it might even cause new rattles. Focus on treating the firewall and wheel arches instead.
