[Woosey]

So I had this all typed out last night, but lost it, and it was too late to re-type it.

My biggest concern with the release of results before having time to go over it all, was the possible misunderstanding of the results, and then, the possible use of the results to falsely claim that they objectively prove something that they in fact, do not. This came to light with the 25% vs 100% testing, where people used the improvement seen to justify using 100% (or more) coverage. But when you really look at the results, they clearly show hugely diminished returns by 100% coverage, gaining a performing 160% as well as 25% coverage, for 400% the cost, and that's ignoring that it does almost nothing at higher frequencies. This is where Don's post's came from, and I understand them after talking with him more on the subject. It seems that he has also gone down this path, with similar testing, and didn't feel comfortable releasing anything for these reasons.

I really had wanted to wait to release the info, until everything was finished, but ultimately, I caved in because this testing wouldn't be possible for me without the help I received from people on this forum. So, in the future, I will continue to release as I test, but I will be trying to better explain what the results show.



On another note, I got Silent Coat products in friday. I cut them monday, and that's where I ran into problems. They are the first product I have been unable to successfully use the die to cut. It is pulling apart the aluminum at the corners and edges. I cut other products afterwards, and they cut perfectly. I am going to test the samples that were damaged anyways, and then cut some with scissors, and test them as well. But there will have to be an asterisk next to the results, as its not quite the same as the others.

Damage to the multilayer product. This is a butyl, bitmen, and mastic product. It also smells heavily of heavy duty petroleum grease, like that used in heavy equipement. Its also a similar red in color as said grease.


This is their 4mm product, a butyl and mastic product.


And this is their 2mm product, a butyl and mastic product.


And this is the current test pile. At least one sample of all untested products, and several samples of already tested products for consistency testing. There will be more too.

Is there a brand name in the alu? if not than you might have old stock...

We use new stock in our shop and there's Silent coat pressed in the alu layer..

 

[Hanatsu]

Is there a brand name in the alu? if not than you might have old stock...

We use new stock in our shop and there's Silent coat pressed in the alu layer..

Mine looks the same as yours. Might be an european version, idk.

Sent from my Samsung Galaxy 3 via Tapatalk.

 

[TOOSTUBBORN2FAIL]

No brand name in any of the Silent Coat product. The product I received came directly from the company owner. He also sent me a copy of the results from fmvss 302 testing (flammability testing for use in a car, all products tested passed).

That said, my tests of the shown pieces went very well for the 4mm product and the 5mm composite layer product. The 2mm product didn't do nessesarily bad, but it did significantly shift the resonant frequency so that it is above the metal plot at the new resonant frequency. This could cause as issue if you have something in your car already exciting panels at that freqency. I want to wait to post the silent coat plots until I can determine if the tears are do anything to the performance.

 

[Woosey]

No brand name in any of the Silent Coat product. The product I received came directly from the company owner. He also sent me a copy of the results from fmvss 302 testing (flammability testing for use in a car, all products tested passed).

That said, my tests of the shown pieces went very well for the 4mm product and the 5mm composite layer product. The 2mm product didn't do nessesarily bad, but it did significantly shift the resonant frequency so that it is above the metal plot at the new resonant frequency. This could cause as issue if you have something in your car already exciting panels at that freqency. I want to wait to post the silent coat plots until I can determine if the tears are do anything to the performance.

Did you try to die em out reversed? maybe an option..

 

[TOOSTUBBORN2FAIL]

Sometime today, ill get the results up for murdermat mdk and bl, raamat, vizomat, and sounddeadenershowdown. I just can't promise when.

Each murdermat product was tested 4 times, mdk was very consistent, bl was less so. Raamat was middle of the road consistency, but only had two samples. Vizomat only had one sample, so it will have to do. I've tested sds 3 times, with pretty good consistency (in fact, the two tests I did yesturday were about as perfect of a match as it can get).


I'm working on pricing out the next phase of testing as well, as its too cool to test today. Nothing to get excited over, just working on a general idea of the total costs involved in going much more in depth. As of now, I'd estimate a total of $6-700 went into this round of testing, between the setup, and sample donations. I want to express that I am very grateful for all who donated financially, donated materials, and donated time helping to make sure this worked out the way it did.

 

[rton20s]

Thanks for the update, and thank you for your efforts. I'll second the thank you for all those that donated materials and cash.

Also, I know it isn't conducive to testing, but thank God for the cooler weather! So nice here today.

 

[TOOSTUBBORN2FAIL]

*STP Vizomat*

This is a stock replacement type sound damper. Not a constrained layer, just asphalt.

80mil Total Thickness

0.76 lbs per square foot

This product was temperamental. It cracked in two places when removing the backing paper. This may or may not have affected the performance, but there wasn't anything I could do. That said, this test has an asterisk on it. It also was attached by glue. It was very difficult to remove.



The peak resonance reduction was 3db. The resonant frequency shifted lower by 17.34hz.

Undamped waterfall


Damped waterfall


The bare metal decayed 6.07db at 100ms after the initial impulse. The damped metal decayed 8.66db at 100ms after the initial impulse.

All in all, this is near the bottom of the list. Also, notice the large peak in the treated response that could easily be excited by something (like the exhaust) that wasn't being excited by it without the product, due to the frequency shift.

 

[itjobhunter]

Great work on the project TOOSTUBBORN2FAIL! Any chance of having a single post with the products tested in results order? It would be cool to see the ranking and a quick look at products tested/not tested. Also, what is the consensus with using paints or coatings? How do they compare??

Keep rockin', I'm loving the thread!

 

[rton20s]

I know it is a lot to read, but he has stated that there will be a new results thread once everything is tested.

 

[TOOSTUBBORN2FAIL]

There will be a final results thread. I have about 2 weeks of testing left, then putting the results together.

It doesn't look like cascade will be sending anything for the testing. The engineer I talked to seemed very excited about the testing, but that was two weeks ago, and an email I sent earlier this week went unanswered. I'll have to look for some of their new products.

 

[foscoe944]

I’m new to this forum and this is my first post. This is a great thread, I can’t wait to see the results!

OP, I don’t see B-Quiet Extreme on your list. I have some left over and I’d be happy to send some to you if you want to include it.

 

[Darth SQ]

2STF,
Might I suggest one more final test.
How about taking one square of cld exactly like you have done before and then cover the entire plate with ccf and of course mlv on top of that and see what the results look like when all three layers are applied?
Since this is the generally accepted form of proper sound deadening, it would be at minimum an interesting test.

Maybe use SDS's product?
Or I can supply you with a sheet of Alpha Damp cld and a sheet of Luxury Liner Pro if you desire.
Thanks again for all your efforts in this lengthy but informative endeavor. :thumbsup:


Bret
PPI-ART COLLECTOR

 

[TOOSTUBBORN2FAIL]

I do have b-quiet extreme, thanks for offering.

PPI, I do plan on doing something along those very lines, as an added, just to see kind of test.


I've been working on this silently as time has been limited, surgery dates have moved up for my mom, so I've been dealing with that. Four neck vertebrae have to be fused, followed by a knee replacement early next year. I'm hoping to have the whole test and results done before thanksgiving.

 

[TOOSTUBBORN2FAIL]

Just wanted to update on Cascade, they did end up sending both Vmax and VB-2HD afterall (and quite a large amount of it). This is the new vmax, so I can directly compare it to the old vmax. I want to apologize to Paul, as he seemed very enthusiastic about it, so I could only assume that after running it by the bosses, maybe they had said no.

 

[rton20s]

Very cool that they ended up coming through.

 

[69Voltage]

Just wanted to update on Cascade, they did end up sending both Vmax and VB-2HD afterall (and quite a large amount of it). This is the new vmax, so I can directly compare it to the old vmax. I want to apologize to Paul, as he seemed very enthusiastic about it, so I could only assume that after running it by the bosses, maybe they had said no.

,

Nice, as I'm planning on using both of those products.

 

[BevoBlitzN]

Can't wait for the final results. I've pushed my new build back until the final numbers come in. Thanks for the hard work.

 

[SkipNJ]

Yeah I want to use the VB-2HD as well, even just as a barrier layer, and to seal up the doors.

 

[jeancwb]

Hi,

May I suggest one test to compare the results?
Can you put a sheet of lead as a sound deadener?
I always heard that lead is the best sound deadener.

 

[TOOSTUBBORN2FAIL]

I may be able to run a test like that. What are people adhering lead sheet with though? And what thickness? I know that 15mil lead sheet is 1lbs per square foot.

Keep in mind, I would expect a lowering of the resonant frequency, but I don't believe that it would lower the amplitude the way the good constrained layer dampers do.