Just from the differences I gotten from my No vented or holes rk tom's to all my drum that do have vents, I think it will be nil to not much difference? your also going to have to consider if the shells have re rings or not the re rings act as baffles somewhat a bad example but compare to a bass guitar or guitar thiele cabinet does? if your following me here?

Compression Wave is not a tool. Sound waves ARE compression waves. Drums do not operate around Pure Newtonian physics. They "push" sound, which is energy movement in the form of a compression wave.

I was just trying to steer you towards a direction that will help you to grasp what's really happening within the drum.

This is not as obvious as it would seem.

that was and is my reference to the thiele cabinet, the re rings disrupt or scatter the sound compression waves, yep this is not such and easy thing is it?

RogerSling - I know you were trying to help me understand all the physics of it. I do appreciate it too! I will be all the wiser for it.

Thank you!

So do you folks think the myth, that "all things being the same" (constuction, materials etc.etc.) a larger diameter shallower BD speaks quicker than a smaller diameter deeper BD, is true or false?

If it is true, do you think removing the vent hole on a smaller dia. deep BD would make it speak quicker or not? Please explain.

Why does it have to be a larger diameter shallow BD ? A shallow and deep at the same radius should be the same result as a larger vs smalleer at the same length..No ??

No. The comparison breaks down, unfortunately. That's why I was trying to steer this into some personal research. All the variables are not known by the users and a complete picture is impossible. This would not be an appropriate forum for a lesson in wave behavior, so this whole stream should probably take a pause for the cause until all parties are brought up to speed. It's an easy enough subject to grasp and the web could provide most all the individual would require for a rudimental understanding.

As far as the drums capability, yes the larger Di. is capable of lower tunning than the smaller Di. but at some point the frequency of both can be equaled by tension of the head, much like the frett board of a guitar starts over but at an octive higher. I can get my 8" roto to sound just like the 10" by tension and they are clearly different sizes. I can get my E and A strings to sound identical, exactly the same by where I pinch the frett board when both are in tune.

I think the frequency of a drum is determined by it`s with only if the tensions are the same...No ?? ...and there is facts in what VM2K said because when I had the solid coated BD heads my BD vibrated the cymbals and the snare but when I changed it to the cut-out center hole, 5", it stopped vibrateing the cymbals and the snare is much less noteable. So escapeing air plays a role in volume of the note !!

Maybe I`m not clear on what it is when refere to a drum speak !!

OddBall - It doesn't have to be large but as I mentioned earlier, a larger hole might also be used in place of the hole folks cut in reso heads. You might be able to use it for two different things or more if the "Acoustic EQ" is considered etc..

As for your second question, I'm comparing the drums that folks have refered to in the myth. The question is can you get the drums mentioned in the "myth" comparisons to speak the same if they are truly different to begin with.

So what do you think about the myth? Do these different drums speak the same or is one quicker than the other?

RogerSling - So does that mean you know how these two different drums speak? If so, do they speak the same or is one quicker than the other, and if they are different would closing the vent hole make a drum speak quicker?