How To: Quiet down cabin noise and improve sound for cheap

[Matt V]

His sound system was louder because there was less loss in dB due to the lack of vibration.

 

[Wagonbacker9]

So you're saying the car actually got louder after the sound deadening?

common misconception, but yes, thats exactly how it works.

 

[slavrenz]

His sound system was louder because there was less loss in dB due to the lack of vibration.

Ah, I misread his post. I was thinking that he was measuring the decibels of outside road noise (sound system off) before and after.

 

[JLBMP5]

SPL competition is a Car audio Sound pressure Level Competition. So you compete by trying to keep as much sound pressure within the vehicle as you can the dynamat reduces the amount of DBs lost within the vehicle as it also keeps things like road noise outside of the vehicle. My reasion for install was for competition. I still have my roof and floorboards to do but my doors were the first to try with this stuff. My Trunk floor and rear hatch was done with fatmatt when I was doing my system install so I cant say how much of an improvemt was done when that was installed first. I think a 1 DB gain is a good improvement. I think with dynamat you do your entire vehicle for a 3db gain so maybe after my roof and floors are done I can acheive that.

 

[slavrenz]

SPL competition is a Car audio Sound pressure Level Competition. So you compete by trying to keep as much sound pressure within the vehicle as you can the dynamat reduces the amount of DBs lost within the vehicle as it also keeps things like road noise outside of the vehicle. My reasion for install was for competition. I still have my roof and floorboards to do but my doors were the first to try with this stuff. My Trunk floor and rear hatch was done with fatmatt when I was doing my system install so I cant say how much of an improvemt was done when that was installed first. I think a 1 DB gain is a good improvement. I think with dynamat you do your entire vehicle for a 3db gain so maybe after my roof and floors are done I can acheive that.

Good stuff.

 

[ToNeZ90]

Installed about 15ft of edead 45 on the 2 front doors and the trunk floor. major improvement. no more rattle from bass and definately better sound quality. Road noise was cut down quite a bit too. I'm doing the back doors and trunk door tomorrow. (nana)

 

[Warburrito]

I just bought my second Protege and did my front doors while I was replacing my door lock actuators. What a difference!!!!! I'll be doing my rear doors and trunk and pillars later because I'm so happy with the results I've already gotten. Thanks so much for this suggestion. I can't believe I never did this on my first protege.

 

[JLiRD808]

I just bought my second Protege and did my front doors while I was replacing my door lock actuators. What a difference!!!!! I'll be doing my rear doors and trunk and pillars later because I'm so happy with the results I've already gotten. Thanks so much for this suggestion. I can't believe I never did this on my first protege.

Lol nice 6 year thread bump!

But while we're at it, did u use the same material as the OP? It seems to have gone up $3 since 2009 lol.

Are there other alternatives to paying out wads for real auto sound-deadening tape?? I've heard about using "roofing tape" also.

THX

 

[MrGiggles]

GTmat on Ebay is only around 2.00 per square foot. The insulation in this thread is just over a dollar per. GTmat isn't bad stuff for the money.

I will say that these cars can most definitely benefit from it. I don't think they had any deadening from the factory, and the steel is pretty thin. My old Camry was a Cadillac in comparison.