2024 RCLB (Long Bed) 5.0L Carbonized Gray OEM+ Lariat Build

[HammaMan]

Reducing road noise by nearly 5db is pretty damn good. A reduction of 3db is perceived by the average ear as 'half' as quiet.

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[ProperRCLB]

The numbers themselves don't seem impressive but real-life experience is completely different. Once I add the MLV to the floor, rear wall, doors and headliner I'd expect these numbers to drastically come down.

 

[honda250xtitan]

Reducing road noise by nearly 5db is pretty damn good. A reduction of 3db is perceived by the average ear as 'half' as quiet.

this is crazy context.

nice job to the OP.

 

[HammaMan]

In the crew cab there was already NVH coating on most of it and the super thick carpet works well. Not sure how the reg cab is. I instead focused on the plastic pieces

 

[v8440]

Reducing road noise by nearly 5db is pretty damn good. A reduction of 3db is perceived by the average ear as 'half' as quiet.

Actually, that's not quite correct. A 3dB reduction reduces power by half, meaning the intensity of the sound reaching the ear (or radio waves reaching an antenna) is reduced by half. However, a 3dB reduction does not sound half as quiet, the apparent reduction is less than that. It takes a 10 dB reduction to reduced perceived volume by half. Or put differently, it takes a 10 dB increase to double perceived volume.
So, if you double the power supplied to a speaker a 3dB increase in loudness will be heard. If you supply 10x the power to the speaker, a 10 dB increase in loudness will be heard, which is perceived as roughly a doubling of volume. If you supply 100x the power to the speaker, a 20 dB increase will be heard, which is a quadrupling of apparent volume to the ear.

 

[HammaMan]

Actually, that's not quite correct. A 3dB reduction reduces power by half, meaning the intensity of the sound reaching the ear (or radio waves reaching an antenna) is reduced by half. However, a 3dB reduction does not sound half as quiet, the apparent reduction is less than that. It takes a 10 dB reduction to reduced perceived volume by half. Or put differently, it takes a 10 dB increase to double perceived volume.
So, if you double the power supplied to a speaker a 3dB increase in loudness will be heard. If you supply 10x the power to the speaker, a 10 dB increase in loudness will be heard, which is perceived as roughly a doubling of volume. If you supply 100x the power to the speaker, a 20 dB increase will be heard, which is a quadrupling of apparent volume to the ear.

There's also another variable at play here that isn't registered on a decibel meter that some people overlook. By adding dampening material, it's both reducing the noise level while simultaneously changing the frequency essentially turning 'white' noise to 'pink'. Less higher harsh frequencies turning 'shhhh' to 'cuhhhhhhh'.

This can be observed in some of the noise tests TFL does using a decibel meter alone. It's funny watching the guess what the noise level is but they can't quite nail it in some vehicles because it has harsher (higher) frequencies but they just accept it because the meter doesn't lie after all.

 

[v8440]

Makes sense, the meter has flat response but the human ear doesn't, and then you add to that the mind's reaction to noise which tends to find higher frequencies more disturbing than lower. I just wanted to point out some stuff that strictly speaking isn't quite the way you said it when it comes to decibels vs power and volume.

 

[ProperRCLB]

Here is an Update.

Added Resonix CDL + Resonix Guardian to the Door Panels. Unfortunately do not have too many pictures. Also ordered Block off Plates for the front door by SoundsGoodStereo and Second Skin Damplifier Pro Butyl for the inner side of the doors. Note: I have not installed any sound proofing barriers yet (like MLV).

Lot of vapor/humidity inside the doors:

OEM Barrier Removed:

Resonix CDL + Resonix Guardian installed on outer door panel.

Results:

Fully stock: 75.5 db @ 35mph
Resonix on Rear Wall: 71.1 db @ 35mph
Resonix CDL+ Resonix Fiber Mat on Rear Wall + Resonix CDL on Headliner/Roof: 70.6 db @ 35mph
Resonix CDL+ Resonix Guardian Door Panels: 69.6 db @ 35mph

Total Reduction: 5.9 db

Next:

• Block Off Plates on Interior side Doors
• Second Skin Damplifier Pro Butyl (a bit more manageable than Resonix CDL) on Interior side Doors
• Resonix FiberMat 25 on Interior side Doors / Door panel
• OEM Carpeted Floor Liner and remove OEM Vinyl
• Resonix Barrier (MLV) on Floor Liner

 

[ProperRCLB]

While there, began updating the interior to the 2024 Lariat interior. Door panels are in! Steering wheel, Black carpet and leather seats coming next.

OEM XL:

OEM Lariat:

The new door panels is an exact match to the 2024 XL Dash so I do not have to upgrade that to match (thankfully!)

 

[HammaMan]

Nice work -- have you gotten to the roof yet? Makes a big difference in the rain for sure

 

[ProperRCLB]

One thing I noticed is I do not have this sound deadning mat on my OEM door panels and they did not come in the new door panels I Installed.

 

[ProperRCLB]

Nice work -- have you gotten to the roof yet? Makes a big difference in the rain for sure

Yes. Waiting for MLV for roof.

What trim do you have?

 

[HammaMan]

One thing I noticed is I do not have this sound deadning mat on my OEM door panels and they did not come in the new door panels I Installed.

Oh wow so XL doesn't have what I refer to as the "pillows"? My XLT has them.

I added ambients in the door panels and went full retard on dynamat (back of the top looking down at the pocket, lights bleed through the slit above the pocket)

Door handle area

Lines indicate where I put LEDs, tied them into the door lock illumination circuit which is on the dimmer

Everything got butyl rubber -- I mean everything. Didn't photo what I did to the console, everything torn apart and butyl rubber and fabric tape on every single joint / clip / interface rub location.

 

[ProperRCLB]

Oh wow so XL doesn't have what I refer to as the "pillows"? My XLT has them.

I added ambients in the door panels and went full retard on dynamat (back of the top looking down at the pocket, lights bleed through the slit above the pocket)

Door handle area

Lines indicate where I put LEDs, tied them into the door lock illumination circuit which is on the dimmer

Nice! Did you measure it? I'm curious what yours would read using DecibelX app: https://apps.apple.com/us/app/decibel-x-db-sound-level-meter/id448155923

 

[HammaMan]

No. It was pretty quiet to begin with. It's real quiet now. I went around beating on everything with my fist to find noise. Then I just went overboard. Every single piece of plastic in the truck is treated. Everywhere it interfaces to is treated. Everywhere 2 plastic parts touch there's a combo of butyl rubber and fabric tape.

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