Shhhhh Quiet Please (3rd Gen Sound Deadening Project)

[alphyn]

REFERENCE: T4R Sound Deadening Builds

Below is a list of sound deadening build threads for easy and quick reference.

Skidmarcx Sound Deadening Thread
Shoots Build Thread
004runnerLTD's Soundproofing Thread

Also including any tutorials I've found elsewhere.

Sound Deadener Showdown

 

[alphyn]

i still have about 20sq ft of stuff left and i need to do the roof. when i turn the subs up, it shakes the roof and it slaps against my smaller 3 rails that lay on the roof outside. but i have done everything else. (just dont want to pull the head liner.

My headliner is definitely coming off. My roof rack creates a ton of noise, especially with snowboards on top. It'll be interesting to see what CLD does up there. I'll definitely give you a heads up how that goes.

 

[alphyn]

I will hopefully have my runner rolling again by the end of the month. I will post up some "after" spl measurements when I do, so you can get a feel for the effectiveness of the materials I used.

Much appreciated, blink. Looks like this is quite a popular thing to do around here!

 

[BrianSD_42]

there is so many options you can do when it comes to this type of mod, i did quite a bit of searching and found the best that worked for what i wanted to do at a super cheep price.

[MENTION=14772]shootmymime[/MENTION]

I also did this mod a few years ago back in 2007. After looking at your thread pictures I have concluded that the unlabeled "sound mat" you bought off EBAY for $65 is actually construction grade roofing liner.

I did a bit of research before doing a sound proofing mod and I decided to go with the cheap construction material myself. Well I walked into a local paint and roofing supply store to buy my matting and it came in the same 100 sq ft roll and had the same unlabeled silver lining. Back to your sound mat ... I am sure that you and I have the exact same material and I strongly believe yours is construction material just like mine.

Best sound mod for < $100 ever! I did the two front doors and entire interior. It has worked out great btw and the smell went away after a few weeks.

The pictures below are from Shoots thread:

 

[BrianSD_42]

My headliner is definitely coming off. My roof rack creates a ton of noise, especially with snowboards on top. I

[MENTION=73567]alphyn[/MENTION]

what kind of noise? Because most of the wind noise will likely still be there after the mod is complete.

I saw the biggest improvements in speaker performance of the doors after adding the mat and of decreased road noise, say from driving over a brick or stone road. There is still some noise from wind hitting the windshield but I don't hear it anymore because my brain is "just over it" lol.

 

[BlazeRunner]

Just so you know, if you decide to use a decibel app, you will not be properly reading decibels that you are hearing, but the decibels the device's microphone will be able to pick up. For example if the microphone has a frequency level of 100hz-10,000hz (10khz), then any low frequency sounds such as road noise or humming under 100hz will be completely inaudible to the microphone... also not to mention the sensitivity of the mic will be aimed for human vocalizations (3-5khz). You can get actual sound level meters for decent price on amazon and ebay if it's that important to you. I am an audio engineer, I just had to explain this, and would really like to see the difference in SPLs.

 

[shootmymime]

[MENTION=14772]shootmymime[/MENTION]

I also did this mod a few years ago back in 2007. After looking at your thread pictures I have concluded that the unlabeled "sound mat" you bought off EBAY for $65 is actually construction grade roofing liner.

I did a bit of research before doing a sound proofing mod and I decided to go with the cheap construction material myself. Well I walked into a local paint and roofing supply store to buy my matting and it came in the same 100 sq ft roll and had the same unlabeled silver lining. Back to your sound mat ... I am sure that you and I have the exact same material and I strongly believe yours is construction material just like mine.

Best sound mod for < $100 ever! I did the two front doors and entire interior. It has worked out great btw and the smell went away after a few weeks.

The pictures below are from Shoots thread:

Yeah I know it was roofing material. But fit works amazing on stopping rattles from my subs

 

[BrianSD_42]

Yeah I know it was roofing material. But fit works amazing on stopping rattles from my subs

Yep. It worked great for me as well!

 

[alphyn]

[MENTION=73567]alphyn[/MENTION]

what kind of noise? Because most of the wind noise will likely still be there after the mod is complete.

I saw the biggest improvements in speaker performance of the doors after adding the mat and of decreased road noise, say from driving over a brick or stone road. There is still some noise from wind hitting the windshield but I don't hear it anymore because my brain is "just over it" lol.

The roofing materials (CLD - constrained layer damping) you and Shoot used doesn't actually reduce levels of noise entering the cabin, but decreases resonance. Any rocks, shudders, bumps, or whatever other noises are caused from outside sources will still, as I understand it, enter the cabin at the same decibel level but die out quickly. Sound Deadener Showdown has a great writeup about it halfway down what CLD actually does.

But I'm totally with you on how much just that alone can change the experience driving along. I installed about 32 sqft of Dynamat Xtreme on my girlfriends 2001 4runner on all 4 doors and the rear cargo floor area. It made quite a bit of difference and a lot less clangy. I'll sound test her 4runner as well with just the dynamat in it. However, don't have baseline measurements for hers.

When I redo my headliner, I will also be including a layer of CCF, which should reduce the overall decibels entering the cabin. That's the hope, at least.

 

[alphyn]

Just so you know, if you decide to use a decibel app, you will not be properly reading decibels that you are hearing, but the decibels the device's microphone will be able to pick up. For example if the microphone has a frequency level of 100hz-10,000hz (10khz), then any low frequency sounds such as road noise or humming under 100hz will be completely inaudible to the microphone... also not to mention the sensitivity of the mic will be aimed for human vocalizations (3-5khz). You can get actual sound level meters for decent price on amazon and ebay if it's that important to you. I am an audio engineer, I just had to explain this, and would really like to see the difference in SPLs.

Blaze, thanks for the clarification and the info. Any chance you have any low cost decibel meters you would recommend?

I checked Amazon and came across this.

 

[nodixe]

Lizardskin...I heard about it on powerblock or something like that...reduced noise like 20db (?). Thats a lot of noise. Also I found a blog about welding in some bracing on roof for strength (4crawler com?) as there is little support for a loaded roof rack. I was planning on sound deadening as well, and would also like to maybe install some tweeters at head level or in the recesss around sun roof.

 

[Kurtis]

I'll also vouch for using the roof repair kit stuff. I used on my '94 pickup. Definitely helped. I would do it all over again too.

 

[BlazeRunner]

Blaze, thanks for the clarification and the info. Any chance you have any low cost decibel meters you would recommend?

I checked Amazon and came across this.

Honestly, you don't even need to spend that much. You'd be fine with this. It's A-weighted meaning it's tuned to hear the same way humans ears do, and the frequency range is good for many all purpose applications; 31.5hz-8khz you can't hear much lower than this can measure, and same with the 40-130db that will cover just about anything besides whispering quiet. You could also use it to tune a theater system, car stereo or something like that later on.

 

[ajonesnv]

Holy crap this is becoming one of the most informative threads on this topic. thanks guys keep it up!

 

[alphyn]

Lizardskin...I heard about it on powerblock or something like that...reduced noise like 20db (?). Thats a lot of noise. Also I found a blog about welding in some bracing on roof for strength (4crawler com?) as there is little support for a loaded roof rack. I was planning on sound deadening as well, and would also like to maybe install some tweeters at head level or in the recesss around sun roof.

Lizard Skin has been added to the vendor list reference post.

Additional bracing for the roof? Damn! Looks like I'm adding that to the to-do list! This project is spawning off several sub-projects. Is this where I come to terms that my 4runner will never be complete?

 

[JohnsD90]

Man, you are sheltered if you think a 3rd gen is loud. You should come take a ride in my cummins or rover, the 3rd gen is a rolls royce in contrast.

 

[alphyn]

Lizardskin...I heard about it on powerblock or something like that...reduced noise like 20db (?). Thats a lot of noise. Also I found a blog about welding in some bracing on roof for strength (4crawler com?) as there is little support for a loaded roof rack. I was planning on sound deadening as well, and would also like to maybe install some tweeters at head level or in the recesss around sun roof.

@nodixie - added Lizard Skin to the list of vendors. Looks like they sell a foam based product. Another thing to investigate. Thanks for the info!

EDIT: whoops, guess I already said that above. Long day at work. Long weekend. My marbles are here somewhere.

 

[alphyn]

Man, you are sheltered if you think a 3rd gen is loud. You should come take a ride in my cummins or rover, the 3rd gen is a rolls royce in contrast.

Ha! Talked to a guy at an auto sound store (is there a better name for these places?) the other day that was telling me how insanely loud some of the rovers are. Aluminum body and all. He used a ton of materials, but was able to make it quieter than a Mercedes GL450.

 

[alphyn]

10/14 Weekend Update

This weekend was full of prep work for the impending sound deadening project. I realized that if I was going to rip out my entire interior, I needed a clean dry place to store it. My garage is a disaster at the moment, so I spent an entire weekend cleaning it out. Also, figured I should re-wire the entire garage while I was at it. Because why not? And sure, time to put in new shelving. And peg board the workbench area.

Projects are never easy or simple, eh?

 

[JohnsD90]

Ha! Talked to a guy at an auto sound store (is there a better name for these places?) the other day that was telling me how insanely loud some of the rovers are. Aluminum body and all. He used a ton of materials, but was able to make it quieter than a Mercedes GL450.

Yeah, i mean, its not terrible, the worst part is i dont have my overdrive installed, so the engine noise is the loudest. I just don't know if i could live with the 4runner being quiet enough so that i hear more squeaks and such rather than a slightly louder consistent wind and motor which i dont mind hearing. Good luck with it and i hope you get the results you are hoping for.