Belly pan = less road noise?

[NoD~]

I'm looking for those who have installed belly pans to throw me an answer on this one. I'm thinking, in theory, belly pans should reduce overall noise inside the cab from road noise. 2 reasons...
1. Less wind noise in general under car
2. Additional barrier between driver and road

Has anybody experienced this in the real world? Currently, my vehicle I'm building has had all deadening materials removed. I'm planning to add a minimal amount back in (light-weight aftermarket stuff), but was curious if an added benefit of the belly pan would be a noticeable amount of noise reduction.

I realize that a lot of noise exists in places such as doors and wheel wells, but was just wondering on the floor noise alone.

Thanx!

[Sporty Modder]

It depends on where the noise is comming from. If it is from air turbulance under the car a smooth belly pan will reduce that. Tires rolling on the ground make noise to, that is often transmitted through the chassis by vibrations, this will not be reduced.

[COcyclist]

In my case, my mpg is up but it is not not really any quieter. I do have the back seat and parcel shelf removed but I think most of the noise I am hearing comes through the wheelwells. I used Dynamat on them and the trunk, modest improvement. It was much quieter with the back seat in but it limited my cargo space and weighs almost 100 lb. for that and the spare tire in the VW.

[Sven7]

I've got all the rear panels and soundproofing removed, and have front and rear belly pans. It's still noisy.

[MetroMPG]

I noticed reduced noise with the belly pan on my Firefly.

[echo-francis]

my belly pan have a bit reduced the noise at higher speeds

[TOOSTUBBORN2FAIL]

I know this doesnt help right now, but I plan on measuring the noise reductions of an undertray as soon as I can get mine built with an RTA. I'll not only be able to measure amplitude average over time, but also the frequencies that are most affected.

[mcrews]

(Infiniti Q45) When I had the full underbelly paneling, I (thinnk) remember saying to myself...."hummm seems quiter" .
but I cant swear to it.
Now I am just running the front belly pan and the rear pan.
My car is extrodinarily quite to start with.

[skyking]

the cummins diesel is a huge resonant beast, and the pan seems to make it quieter outside the truck, and a bit noisier inside. It is not bad. I notice less wind noise now in the gusts.

[cfg83]

NoD~ -

I think it can help but it depends on the execution. Some people have experienced more noise, like if it's made of metal that isn't isolated from the body of the car.

CarloSW2