Sound Deadening, A little more technical question Options

[r_towle]

Hi,
I have been reading lots on the Internet, and the more I read, the more I find that no-one has done any real analysis.

What type of sound does a motor make?
Is it vibration, or soundwaves?

I guess what I am looking for is not the Use Dynamat, Use Brown Bread type of answer.

What if I combined both the ceramic spray on products, and the peal and stick products?
Aside from throwing alot of money at the problem, am I really stopping any more sound waves from coming through?

Are there any discussions of what sound waves Dynamat stops, and what sound waves a spray on ceramic sound deadening system stops?
Are they the same waves?

It seems to me that when you use two of the correct products, each designed to stop a certain type of sound wave, you will get a much better result.

But, where is the info telling me which sound wave is stopped by what product?

Rich

[r_towle]

We are honing in to my question, and thank you Tony for getting the idea to surface again in my head.
At some point in time I read an article that I cannot find again.
summary.

Sound travels in waves. Different frequencies have different wave lengths. Different materials block certain wave lengths.
This is why Dynamat is rubber backed with Aluminum. It provides two different materials which in turn block different wave lengths.
Leave the vibration out of this discussion, it is a bonus.

So,
Keep the stock look (no 2 inch close cell foam)
No good ideas?, dont reply...learn. that is what this place is for.

Dynamat blocks X number of wave lengths
Spray on ceramic blocks X number of wave lengths.
The net result is blocking more wavelengths than just using one or the other.

Now, the question remains.
What is the difference in products, and what wavelengths do they block?
If combined, do you actually block more wavelengths.

And the remaining question.
What wavelengths does a motor produce?

I know its a bit technical, but this is how good well thought out solutions are created.
Yes, I could buy a toyota, I know.
Ben Franklin could have just lit his whale oil lamp and called it a day.

Think outside the box here guys.
The new Caddy I rented, while it is quite large, was as quiet as a mouse inside.

I am looking to make the 356 the same way.
Not a 3-4 inch think wall of Home depot foam.
A good solid solution that implements the new technologies to solve a real old problem with this car.

Rich