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Sound deadening, sound proofing - which have you done and what are your results?

Pstyckiewicz

Pstyckiewicz

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Used some sound deadening stuff off Amazon.


And some ceramic fiber for the dog house area.


Also used some 4 way stretch carpet on top of everything.
 
F

Foxclub83

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Pstyckiewicz said:
Also for the tunnel I used 3/4 plywood wrapped it and glued down the 4 way stretch carpet. The hole piece is held down with bolts into nutserts and the top of the bolt is capped off to give it a nice finish.
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Nice work. Great ideas. What about drainage? Any issues or did you make cuts at the drainage slots?
 
thoner7

thoner7

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4 way stretch carpet? Never knew that existed.

Where’d you get it/what brand? Is it self adhesive or did you use a spray?
 
Pstyckiewicz

Pstyckiewicz

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So the carpet is called underfelt. It’s also called 4 way stretch. It is not to bad to work with. They use it a lot in camper van stuff. It is glued down. I used 3m spray glue. Spray the surface then spray the carpet and stick them together.

 
thoner7

thoner7

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Pstyckiewicz said:
So drainage I just covered it up. It’s water tight from the rain. I used a lot of seam sealer. I have the PlanB top and doors.
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if that carpeting durable? Or would it rip if there’s a have bag thrown on it for example


my top and doors are good now too from rain, but I still get some water in from around the snorkel and windshield washer bottle areas in the front driver and passenger footwell. And a little around the rear glass at the rubber weather strip
 
H

Hummer Guy

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United States Louisiana
Pstyckiewicz said:
Used some sound deadening stuff off Amazon.


And some ceramic fiber for the dog house area.


Also used some 4 way stretch carpet on top of everything.
Click to expand...
Did the sound deadening make a big difference? I installed what I thought was sound deadening from the advertisement, but it really was just insulation for hit, its way too light to be a sound deadener. I don't want to rip it out so I may just do the sound deadening in the firewall.

I use some actual sound deadener in the m35a2 and it made a difference but was worried it won't in the humvee since the engine sits so close to the inside of the vehicle
 
thoner7

thoner7

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Hummer Guy said:
Did the sound deadening make a big difference? I installed what I thought was sound deadening from the advertisement, but it really was just insulation for hit, its way too light to be a sound deadener. I don't want to rip it out so I may just do the sound deadening in the firewall.

I use some actual sound deadener in the m35a2 and it made a difference but was worried it won't in the humvee since the engine sits so close to the inside of the vehicle
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I’m curious, what is your “actual sound deadener”
 
H

Hummer Guy

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thoner7 said:
I’m curious, what is your “actual sound deadener”
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Amazon.com: Siless 80 mil (2mm) 36 sqft (3.4 sqm) Car Sound Deadening mat - Butyl Automotive Sound Deadener - Noise Insulation and Vibration Dampening Material (36 sqft) : Automotive



This one was the stuff I thought was sound deadener: Amazon.com: Abahub 394 mil 16 sqft Car Hood Insulation Pad Auto Sound Deadener Door Dampener Deadening Mat Heat / Cool Liner, Self-Adhesive Closed Cell Material (PE Foam Sound Deadener) 59"x39" : Automotive
 
thoner7

thoner7

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NE TN
For those that care I downloaded a free app on my phone - dB meter - to record my decibels before and after the sound proofing doing. I have an 1165a1 hard top roof and aftermarket fiberglass doors.

highway speed -60-70mph- 90 dB
Country roads, take me home -35-45 mph - 85 dB
Idle - 76 dB

for reference my f150 is 68 dB going 80 on the highway.

I have only completed the passenger side floor so I can’t really say how much it’s worked.
 
Thunderbirds

Thunderbirds

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Northern Black Hills South Dakota
That’s probably the best way to figure out effectiveness. I think I’ll do the same thing. Possibly from head height of passenger and driver side as that is where I keep my ears usually, as well as finding the loudest areas such as tunnel, foot well areas, and others…

Will post soon as I record them. Great idea.
 
Mogman

Mogman

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thoner7 said:
For those that care I downloaded a free app on my phone - dB meter - to record my decibels before and after the sound proofing doing. I have an 1165a1 hard top roof and aftermarket fiberglass doors.

highway speed -60-70mph- 90 dB
Country roads, take me home -35-45 mph - 85 dB
Idle - 76 dB

for reference my f150 is 68 dB going 80 on the highway.

I have only completed the passenger side floor so I can’t really say how much it’s worked.
Click to expand...
There is no such thing as a free app. :eek:
 
Ls3rx7

Ls3rx7

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Tulsa, Oklahoma
I wanted to add some input after I finished doing my sound deadening and interior install this summer. I used these products everywhere there was metal inside the cabin as well as the top.

1st layer I used sound resonix butyl sheets after throughly cleaning.
2nd layer I used a siless foam
3rd layer I used a foil line sheet of plywood for the hatch and tunnel cover and for the floor was a horse stall mat
4th layer for the horse mat and plywood was an all weather boat carpet

Some other things I did to sound deaden was seam seal every crack, weld every hole, rhino line the outside wheel wells and floor boards as well as added sound mat under the hood.

the results were astounding with idles as low as 60db and highways in the 70-75db

I added a sound system and it sounds pretty much like a normal diesel truck from the inside.

I spent overall around $1000 for this result and it was well well worth it!
 

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