How to Reduce Noise in Car Interior

How to Reduce Noise in Car Interior

Driving a noisy car can be annoying, especially if you can’t hold a calm conversation. If you have been pondering how to reduce noise in a car interior, you need a lasting, workable twist.

The sad truth is that the disturbance will get out of control as the car stays neglected.

The noise you hear in a car interior originates from wind, road, tires, suspensions, the engine, among other parts. Unfortunately, soundproofing one area will not mute the entire vehicle.

How can you solve the problem like a pro? How to reduce noise in car Interior is not rocket science.

Read on. This article will take you through all the parts you can soundproof to leave your car quiet.

But first, it is wise you download a decibel meter app, take a short drive, and note the speed.

Use the app to check the noise rating before you soundproof the car. This will be crucial to help you note the noise difference afterward.

How to Reduce Noise in Car Interior

1. Undercoat the car’s underside

Undercoating your car can reduce noise by about 5-6dB, which is a noticeable change to human ears.

It even protects underside rust, dirt, and grime. The trick is you undercoat the right way and with the right rubberized undercoat spray like this oen below.

First, clean, scrape and dry the underside surface to ensure no moisture or dirt remains. Apply the undercoat and give it a few hours or days for the spray smell to dissipate completely.  

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2. Soundproof the wheel Arches.

Your car wheels will often produce some noise depending on the terrain and speed you drive. If they are directional and worn out, you may also notice some sound when driving on smooth roads.

The best approach to reducing noise is to add soundproofing, heat-resistant material like the STP Biplast to the wheel arches. You can also replace the suspension components if necessary.

This will include the steering ends, link rods, ball joints, and shocker bolts. More so, the loser they are, the more they contribute to the car’s interior and cabin noise.

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3. Add vibration dampeners on the car’s floor.

Vibrations are a major noise source in a car’s interior, but you can cramp them down by adding vibration dampeners. Achieving this boosts the vehicle mass and reduces the sounds.

Dynamite is an excellent substance you can use to dampen the noise by up to 20dB. It has adhesive properties on one side and comes in different sizes. Check on Amazon below.

This enables you to apply it under the floor mats of the seats and the door lining without using glue.

You will only need a heat gun and a smooth roller to attach the dynamite and a pair of scissors to cut the overlapping edges.

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4. Soundproof the car’s roof, windows, and doors

Soundproofing the doors, windows, and roof requires checking signs of weakness or tear around the gasket and roof ceiling.

You can take a fast assessment drive on a smooth road with the windows closed to listen to possible wind noise that leaks into the car through seal gaps.

It is wise you pay attention to the door edges as they can also have a problem.

If you notice any damages or weakness on the windows, clean the surface, and apply a rubber installer on the damaged seals.

As for the doors, apply the door edge seal protector for a neat finish and shield from dents.

You can also use dynamite to calm vibrations on the doors and Mass Loaded Vinyl on the roof. Be cautious not to interfere with the circuitry.

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5. Muffle the hood and exhaust

Causes of noise from the hood are many, especially as the car ages, but the engine and weak parts are the biggest contributors.

Of course, you will need a certified mechanic to fix some of the noisy components, such as the catalytic converter, but you can do much on your own.

One of the quick fixes you can do is apply some dynamite lining on the underside of the hood.

If you are confident the exhaust system is in perfect shape, you can attach a muffler instead of making a replacement.

You can also apply exhaust paste, which is a heat-resistant glue. Achieving this will enhance stillness and reduce the levels of noise as you drive.

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6. Install the right tires

Softer, smaller, and narrower tires have a significant impact on reducing noise in a car. In essence, big wheels take up a large surface area on the road, hence making more noise.

Also, harder tires are resistant to pressure. This makes them noisier, especially if they have big voids between the grooves.

A rule of the thumb is you install wheels that suit your driving environment. Large and hard tires will be the best if you spend most of the time on tough surfaces.

FAQ’s: How to Reduce Noise in Car Interior

1. Why is the noise from my trunk loud?

The trunk can amplify noise and vibration under the car’s rear wheels, especially when large and empty. You can add sound dampeners around the trunk surface to reduce the disturbance.

2. How can you reduce noise from the cup holders in the car?

Line the holders with acoustic form. This will seal the hollow spaces around them, reducing vibrations and noise.

3. How can you make the engine quieter if it is not faulty?

Unless the engine has an underlying problem, using synthetic oils can make it run smoother and quieter. The oils have fewer contaminates, lowering the risk of sludge buildup in the engine.

4. How can you make the exhaust quieter without a catalytic converter?

Cleaning or fixing the leaks are excellent alternative ways to silence the exhaust system. You can also install a silencer to shrink the exhaust circumference and noise.

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Let vibrations and annoying sounds never ruin your comfort. With the above tips, you now know how to reduce noise in a car interior.

You even can do most of the soundproofing tasks on your own, provided you have all the needed tools. Overall, take another drive and check the noise difference after you are done with the work.

Ensure you drive the same route and at the same speed as before. You now have some insights on how to reduce noise in car Interior; kindly give us some feedback on what you think.  

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