Sound Deadening Choices

Discussion in 'Gen 2 Prius Audio and Electronics' started by Bill Merchant, Jul 5, 2006.

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  1. Dynamat Xtreme - $7.50/s.f.

    66.7%
  2. B-Quiet Ultimate - $2.60/s.f.

    33.3%
  3. FatMat eXtreme - $1.20/s.f.

    0 vote(s)
    0.0%
  4. FatMat Rattle Trap eXtreme - $1.60/s.f.

    0 vote(s)
    0.0%
  5. eDead v.1.SE² - $1.60/s.f.

    0 vote(s)
    0.0%
  1. Bill Merchant

    Bill Merchant absit invidia

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    I was really inspired by the people who installed sound deadening material in their doors to cut road noise and improve the sound of the other ICE (In-Car Entertainment system). It got too late for me to do it last year, but with the weather warm, it's time to start modding my Prius again.

    I went online to do some reasearch, but ended up more confused. I found these companies supplying sound deadening material, in addition to the elastomeric roofing material at Lowes/Home Depot that c4 mentioned:

    Dynamat Xtreme
    B-Quiet Ultimate
    FatMat eXtreme (45 mil thick)
    FatMat Rattle Trap eXtreme (80 mil thick)
    eDead v.1.SE2

    The various companies have other products, like liquid-paint-on material and thick material for high-frequency sound.

    So my question, fellow PriusChatters, is which ones have you used and which would you recommend? What do you think is the most important characteristic of the material? Thickness? Aluminum face? Butyl content?

    I tried to get comparable prices for about 50 square feet, though some manufacturers sell by the square foot or sell "kits" for doors, etc.

    I look forward to your recommendations and discussion!

     
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  2. jbarnhart

    jbarnhart New Member

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    You missed one choice -- better tires!

    I kid you not, Bill, I was going to add sound deadening to my Prius. But after I got the Comfortreds on the car, the road noise just wasn't bothersome enough to warrant going thru the install.
     
  3. Bill Merchant

    Bill Merchant absit invidia

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    Thanks for your reply, jbarnhart. Yes, one of the first things I did was put Goodyear ComforTred tires on. That helped with road noise and handling, but I want to take the quiet to the next level.

    Any other suggestions?
     
  4. jbarnhart

    jbarnhart New Member

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    I yearn for active noise cancellation -- quiet without the bulk and weight. Sigh, Earth computers just aren't up to it yet...
     
  5. Bill Merchant

    Bill Merchant absit invidia

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    Maybe that's the REAL use for the center speaker...
     
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  6. momanz

    momanz Junior Member

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    <div class='quotetop'>QUOTE(Bill Merchant @ Jul 5 2006, 12:49 AM) [snapback]281289[/snapback]</div>
    I've found this article useful. Haven't decided on taking the plunge though.
     
  7. Bill Merchant

    Bill Merchant absit invidia

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    Thanks, momanz, for the great reference article! Have you installed any sound deadening? I see you're in Oregon too. Near Portland?
     
  8. PriusDad

    PriusDad New Member

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    I hate to add even more confusion, but I came across this stuff while considering sound damping material myself:

    http://www.quietcar.net/

    This stuff is a spray/brush/roll on visco-elastic polymer that weighs considerably less than Dynamat and its competitors, since it dampens sound by converting it into small amounts of heat rather than relying simply on mass to resist sound transmission. In all honesty, I don't really want to add the 40 to 100 lbs. of dead-weight incurred by Dynamat to my Prius. By comparison, 5 gallons of QuietCar, which according to the web site is what a Prius would need for door, trunk, floor, and firewall coverage works out to about 18 lbs. when dry. And it's less expensive per square foot too.

    Hunting around a bit more, I discovered that QuietCar is one of a number of products made by http://www.quietsolution.com , including similar products for boats, trains, and aircraft, as well as a number of sound dampening products for home construction. All this leads me to believe these guys know what they're doing when it comes to stopping noise.

    However, I have a huge disclaimer here: I have not yet had the courage to remove the door panels, seats, and carpets from our new Prius to go put this stuff in. So I can't tell you how well it works. But when I do build up the courage, this is the stuff I want to try, not DynaMat.

    Maybe I can convince the local car-stereo place to dismantle the car and apply it for me. At least they know how to take a car apart and reassemble it without ruining anything... well, I hope so anyway. :D

    Regards,

    Peter.
     
  9. mrbigh

    mrbigh Prius Absolutum Dominium

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    Bill, I haven't do it on my Prius yet but on my sons '05 Hyundai Tiburon, we B-quiet basically his entire car to kill all rattles when he played his 3KW sound system for competition purposes. By cost/properties average, that was the best solution. We did 3 layers and add near 80 lb. to the total weight .
    I have left some material to do the front doors, task that i will start after returning from out trip to the 2006 Hybridfest. At the moment, to compensate for the road noise, I crank louder the sound system and get a back massage ;)
     
  10. savingtheearth

    savingtheearth Junior Member

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    I had Dynamat and the new Dyna-sorb installed- adds some weight but really makes the sound system sound better.
     
  11. Tadashi

    Tadashi Member

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    Something that will help your decision is to look at each of the spec. They each have a different temperature in which they dampen sound. I also chose the lighest one. At the time Dynamat Extreme was the best but most expensive. B-quiet was a close runner up.

    I had the entire cabin done and it has reduced the A/C usage as well. I am not sure if the weight reduced my mpg but seeing as how I rarely use A/C or only need it at the lowest level saves mpg. It took about 96 s.f. which is about 45 lbs.

    I have found that doing the doors and floors will be your biggest noise reducer. The ceiling and trunk did not do so much. They did everything but the battery case. I had my Prius done in three parts since the shop kept running out of insulation. The cost should run around $600 - $700.

    BTW, I did the same thing to my old F250 diesel. The difference was night and day. It made my truck absolutely quiet. I could barely head my engine. I would have to roll down the window to ensure it sounded right.
     
  12. mrbigh

    mrbigh Prius Absolutum Dominium

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    Well Bill, being that the wheather and spare time helped, here are the pictures of the job in progress, I used as I said in the earlier post, Bquiet sound and vibration dampening material. The rolls are 12" and 15lbs.
    I applied 2 layers of material on the inside skin of the door, one above the other and a single layer in the inside of the door in the outside skin in manageble strips sizes( probably this step can be avoided, is to messy and cumbersome) and an extra piece of 20" that was left over by the center with the big opening. I removed and discarted the inside plastic vapor barrier. Routed the wires, opened the sockets for the wire harness and affixed the wires of same harness with left-over pieces of material. Also made round openings for the plastic plugs for the inside decorative skin.
    After completion, the door tested MORE solid and it really does cut road noise and my Alpine speaker sound better, now it has a better metallic box. Notice that the replacement speaker is mounted in the old plastic basket of the OEM spkr.
    The first door took me 1 1/2 hs implying dissasembly, planing the job and layout of components, actual job, cutting openings, fastening the wire harness, testing for rattles and spkr. and closing everything.
    Not to bad, tomorow I will do the drivers side. ;)
    The pictures can be magnified for more detail.
    Horacio

    Door, full view
    Door, detail on install


    Edit: drove it trough a rough concrete surface road that I know and with certainty the addition of this material does cut down a lot the road noise while traveling, it's a posite improvement. :D
     
  13. mssmith95

    mssmith95 Michael

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    <div class='quotetop'>QUOTE(mrbigh @ Jul 14 2006, 03:32 PM) [snapback]286438[/snapback]</div>
    Can't get your links to work...can you please double check them?

    Thanks!
     
  14. kn6vv

    kn6vv Junior Member

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    <div class='quotetop'>QUOTE(Bill Merchant @ Jul 5 2006, 03:36 PM) [snapback]281641[/snapback]</div>
    Bill,

    Can I ask what size ComforTred you went with? As I read other PC threads here on tire replacement for the Prius, I see many going up in size to the 195 or 205/65-15s.

    Also did you notice a big difference in noise level over the stock Goodyears? I'm expecting my Prius to arrive in a couple weeks and thinking about going direct to my Goodyear dealer when I take delivery.

    Thanks! Tom
     
  15. pre-cbs

    pre-cbs New Member

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    <div class='quotetop'>QUOTE(kn6vv @ Jul 14 2006, 06:03 PM) [snapback]286511[/snapback]</div>

    You can get ComforTreds in the OEM size of 185/65/15
     
  16. Bill Merchant

    Bill Merchant absit invidia

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    <div class='quotetop'>QUOTE(momanz @ Jul 6 2006, 07:26 AM) [snapback]281979[/snapback]</div>
    Thanks again, momanz, for the link to SoundDeadenerShowdown.com, and to Don Sambrook who created the site and answered my questions.

    I should have put None Of The Above in my poll, because that's what I ended up choosing. Don Sambrook, in his conclusions, says: <div class=\'quotetop\'>QUOTE</div><div class=\'quotemain\'>Best Value
    RAAMAudio's RAAMmat BXT is a high quality product priced to compete with asphalt mats. If you are considering an asphalt sound deadener based on price, please reconsider.

    Remember, you are not just buying square feet, you are buying mass. Most of the asphalt mats are thinner and lighter than the butyl products. This means you will need more layers to accomplish the same result. The only close comparison is eDead v1SE vs. RAAMmat. They are close in weight and thickness, despite the fact that Elemental Designs significantly overstates the density of their products.[/b][/quote] He then shows that the cost difference is negligible.

    Since RAAMaudio is located in St. Helens, Oregon, about 50 miles from me, I took the opportunity to drive over and visit Rick McCallum there. His products are amazing, as he demonstrated in his truck and a Scion he's tricking out. I think he could have made my ears bleed inside the car, but outside it was almost silent. I bought a 62 square foot roll of RAAMmat and 3 yards of ensolite. I'll start attacking my doors this weekend.

    One thing Rick said, which I found interesting having looked at pics of the installations on PriusChat, is that you only need a couple of layers of mat behind the door speakers, and then some extra in the middle of the inside of the outer skin to take away some of the tinnyness; you don't need to line it completely. For quiet inside the car, you need to seal up the inner skin, much like Horacio did. Rick suggested covering the big openings with Screen Door Repair aluminum (it's clear anodized to resist corrosion) and then covering that with mat. He also suggested wiggling everything that can move, and if it makes sound, deaden it. He even puts a dot of silicone at the base of light bulbs to stop them from rattling. By the way, the ensolite is spraymounted over the mat on the inside to absorb the higher-frequency sounds.

    Tom, I got the OEM size 185/65/15 Goodyear ComforTred tires, like pre-cbs mentioned. No worries about nav/milage inaccuracies that way. Driving home from the dealer when I picked up my Silver Cloud I couldn't get over how noisy the tires were and how jittery the ride. I bought the ComforTreds the next day. I think there's a slight MPG hit, but for the handling and quieter ride, it's worth it. I'm getting about 52 MPG now without trying much.

    When I traded in my Camry to get my Prius, the dealer knocked $600 off the trade-in value because the tires were worn, they said. When I trade in the Silver Cloud for the next one, it will have new Integrity tires and unused trim rings on it...

    Thanks, everyone, for your advice and counsel!
     
  17. flareak

    flareak Fleet Captain

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    i got the comfortreds... i dont really think i notice that much of a difference
     
  18. Bill Merchant

    Bill Merchant absit invidia

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    <div class='quotetop'>QUOTE(flareak @ Jul 14 2006, 11:42 PM) [snapback]286620[/snapback]</div>
    Chaque un à son goût.
     
  19. Armature

    Armature New Member

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    <div class='quotetop'>QUOTE(flareak @ Jul 14 2006, 11:42 PM) [snapback]286620[/snapback]</div>
    I put ComforTreds on yesterday and the difference is amazing...both in quietness and in ride. Almost makes me wish I hadn't spent the time wearing out the OEM tires!

    David
     
  20. momanz

    momanz Junior Member

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    <div class='quotetop'>QUOTE(Bill Merchant @ Jul 15 2006, 01:36 AM) [snapback]286616[/snapback]</div>
    Glad to be of service. I didn't realize RAAMaudio was in St. Helens. I may have to take a trip up there at some point. I was considering doing my integra first. I think my wife would kill me if I started taking apart her shiny new Prius...
     
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