Can an Engine Guard Plate Reduce Noise?

[LeTucker]

An engine guard plate cannot reduce noise. Functions of an engine guard plate: It can mitigate the impact of flying debris and water splashes on the engine during driving; improve the aerodynamic profile of the undercarriage, reducing wind resistance and noise. Methods to reduce engine noise: Install soundproofing cotton or opt for a full soundproofing kit. Additionally, replacing the car's door seals with high-quality ones is also an effective noise-reduction method. Road and tire noise are significant contributors to overall vehicle noise. Owners can further reduce tire noise by switching to high-quality, quiet tires such as Michelin, providing a quieter driving environment.

[DiMalachi]

I've installed an engine underguard several times, mainly to prevent road debris from hitting the engine. As for noise reduction, it helps a little, but that's not the primary reason. I remember once when I was on a long drive after installing the underguard, I felt the wind noise and the sound of road gravel underneath the car were slightly reduced—probably because the underguard blocked some debris, minimizing those noises. However, the engine's roar and tire noise remained largely unchanged, as these are the main sources of sound. I think the underguard might absorb some vibrations or reflect sound, providing a minimal effect, but other methods like soundproofing the chassis are still needed for significant noise reduction. Overall, the core purpose of the underguard is protection, with noise reduction being an unexpected bonus. If budget isn't an issue, installing one is a good idea for peace of mind.

[McLayla]

As a car enthusiast, I've studied the role of engine underguards. Essentially, they serve as protective shields against stones and water splashes, with only minor noise reduction effects. Materials like steel plates or plastics can block some sound reflection paths, slightly reducing wind and road noise from under the car, but they don't offer active noise cancellation. The main noise sources are airflow in the engine compartment and tire vibrations, where underguards can only indirectly absorb some. Physically, they dampen vibrations to marginally lower decibel levels, but the effect is limited and incomparable to proper soundproofing materials. In short, if you frequently drive on rough roads, prioritize installing an underguard for damage prevention; for genuine noise reduction, consider other solutions.

[StDamian]

I just installed an engine guard on my car. A friend recommended it for noise reduction, but after trying it out, I didn't notice much difference. The main purpose of the guard is to protect the engine from stone scratches, with noise reduction being an added benefit. After two weeks of use, the noise has slightly decreased, especially the wind and sand noise on the highway, but the engine noise remains the same. I think the guard is worth the money, especially for SUVs and off-road vehicles. In summary: it can slightly reduce noise, but don't set your expectations too high. Regular maintenance of tire pressure and air conditioning can do more to reduce noise during daily driving.