What have you done to your K2 today?

Sierra706 · May 14, 2017

Ok, you win... But, I think you are misunderstanding what I am saying...

I know exactly what your saying and your right as well. But I was lazy. I did the dynamat and pulled the door panels, but chose not to do them once I saw what was already there. Also didn't put as much detail into the back like shamrock did.

Sent from my iPhone using Tapatalk

ShamrockShooter · May 14, 2017

I wasn't expecting a miracle quiet ride so far, but I had fun working on my truck all day. So there you have it[emoji106]

Sent from my SM-G930V using Tapatalk

6.2Midnight · May 14, 2017

Ok, I just wanted to not argue over it. Honestly, we all know it cam be a real pain in the back side to do it right, but, in the long run it's really worth it. I used to do stereo competition when I was younger. I can't even begin to think of how much weight I added to every vehicle of mine that I put Dynomat or the like in over the years, good thing I build the crap out of the motors to haul the extra weight, LOL!

I'm sure what you ended up doing helped the sound out as well. I would like to line my truck as well, but I just can't justify doing it to this low mileage of a vehicle with only stock components. It sounds just fine for now, someday, maybe... When I do, I'll add component speakers, and a small woofer, just to add some depth. One of the things that keeps me from doing it for now, is the HMI, it ties into so much of the truck, and honestly, I haven't even spent a minute to see what I could replace it with that would do all the things I would want it to.

Bmz72 · May 14, 2017

"Unless you are applying full sheets in multiple layers to try to reduce panel flex (for SPL competition purposes), the purpose of Dynamat (and similar type materials) is to lower the resonant frequency of the vehicle's body panels so that they do not "ring" when music is played. While these products claim to do all kinds of other stuff... in reality, all you are doing is lowering the resonant frequency of the panel below the audible frequency range, so it doesn't "vibrate" and color the sound with unwanted noise (either from road vibrations, music, etc). You can achieve much the same effect by sticking or smearing any kind of dense, heavy material on the panels. The main benefits to the dynamat type products are their convenience/ease of installation, and the ability of the the better quality products to adhere well in extreme temperatures.

It will not do much of anything to insulate the cabin from outside noise - road or otherwise. The reduction in road noise comes from the fact that the vehicle's body panels are no longer "ringing" from the vibration of driving down the road."

On a side note it would be interesting to see pico scope reading before and after as most of vibrations are felt/heard in different frequency hertz. I wonder what the cut in noise db would be?

6.2Midnight · May 14, 2017

"Unless you are applying full sheets in multiple layers to try to reduce panel flex (for SPL competition purposes), the purpose of Dynamat (and similar type materials) is to lower the resonant frequency of the vehicle's body panels so that they do not "ring" when music is played. While these products claim to do all kinds of other stuff... in reality, all you are doing is lowering the resonant frequency of the panel below the audible frequency range, so it doesn't "vibrate" and color the sound with unwanted noise (either from road vibrations, music, etc). You can achieve much the same effect by sticking or smearing any kind of dense, heavy material on the panels. The main benefits to the dynamat type products are their convenience/ease of installation, and the ability of the the better quality products to adhere well in extreme temperatures.

It will not do much of anything to insulate the cabin from outside noise - road or otherwise. The reduction in road noise comes from the fact that the vehicle's body panels are no longer "ringing" from the vibration of driving down the road."

On a side note it would be interesting to see pico scope reading before and after as most of vibrations are felt/heard in different frequency hertz. I wonder what the cut in noise db would be?

Well, I do know for a fact that it does cancel road noise, as well as the rest of the benefits you mention. No, I don't have laboratory proof to post on hand, but, I have been part of the testing in the past and can tell you it cancel road noise. If you look back at my post where I mention the me Dodge I used to own, it gives you the idea.

I can't go into too many specifics about any certain automaker, or vehicle, as some of the legal paper with I had to sign is still in effect.

The next thing to go after is how transparent the glass is, but that would be going off topic.

ShamrockShooter · May 14, 2017

Well if you knock on the sheetmetal before the dynomat it vibrates like crazy. After I put it on the knocks were muted since the sheetmetal wasn't vibrating. It didn't cost me much but my time so I figured I'd give it a try. I didn't go all out like others have here sound deadening because I don't have a garage or the ability to tear my entire truck apart for a few days. My exhaust felt like it was vibrating cabin, so I figured I try just the dynamat and a thicker pad and see if it improved the sound quality of the exhaust. If it didn't work I was only out my time and a few bucks.

After driving with the dynamat the exhaust note seams cleaner and less harsh but not really any quieter.

I do want to thank all the members here for helping me learn about sound deadening. There were lots of different points of view so I went with an average of those.

Sent from my SM-G930V using Tapatalk