Yes, maybe...Although I don't have the patience or Instruments, to factor in any real [img]graemlins/jawdrop.gif[/img] results...still working on theory. [img]graemlins/offtopic1.gif[/img]

 

anyway the hearing is the best result or test you can have ,numbers aren't always the answer [img]graemlins/beer.gif[/img]

 

Awesome work man...

As a newbie that gives me something to work toward.

I got a few questions regarding sound deadening doors in general.

Putting dynamat or whatever you choose on the inside of the door, is this trying to accomplish changing your door into a large enclosure for the driver?

Is it only to reduce rattles, etc?

A baffle... what exactly is a speaker baffle?



In that picture for example. Once the speaker is mounted, and all that VB2 is applied, does this make the airspace behind the speaker like an enclosure?

If this is true, what about the open areas where cables, levers, etc. HAVE to come through? It would no longer be a sealed enclosure right?

I guess Im just starting from the basics on the root question "WHY do we sound deaden our doors".

I can understand why giving your doors more mass, less rattles, and a nicer material for the sound would make it sound better, but is there more to it then that?

 

Good questions.

Using any kind of sound deadening is aimed at reducing noise. Speakers mounted in a door, cause the door to make noise. So adding sound deadening helps reduce (but not entirely eliminate) noise from your door when playing music. There also is the benifit that the car will be quiter to drive.

In my case, I added so much sound deadening that the door became an enclosure. You don't have to go this far to get good results.

Small openings around the door from levers and such that are not covered in sound deadening will not be that detrimental to the sound of the speaker. But, depending on the amount of air that the mounted speaker can move, these holes could make some noise as air is pressed through them. You will have to play with this yourself, but providing a pressure relief such as a large open area in the door can help you get rid of "air noises" if you have them. In my car, the door is so well sealed, that I can move large amounts of air through the door latch area at high sound pressure levels. It's inaudible if the door is closed.

Sometimes there are benifits to having a speaker mounted in a well sealed enclosure. With my speaker, this was not the case. I did enclosure modeling (calculated the results of various box sizes) that illustrated a pronounced benifit from increasing enclosure volume. To keep it simple, I've mounted the speakers in what's known as an infinite baffle arangement. (or IB for short) This is simply a very very large box in theory. Not all speakers can do this well though, so it's worth some experimentation. MOST car audio midrange speakers are designed by the manufacturer to mounted in a door like this. So they usually take a liking to this type of setup quit well. That isn't to say that it's the best way to mount a speaker, because I know of one board member here that has door mounted his midrange in a ported enclosure (vented box built into the door) From all reports, that car sounds pretty good.

A speaker baffle is simply what you bolt or screw the driver to. (speakers in their raw form are refered to as drivers) It can be made of anything, but the more sturdy the better. In home speakers for example, the front face of the speaker cabinet is refered to as the baffle. In car audio, our baffles are usually much smaller, but they perform the same function.

Thanks for the compliment.

Adam

 

When I heard speaker baffles, I looked on google and found things like this:

http://www.autotoys.com/x/catalog/Sp...e_1_c_561.html

What would that make a speaker sound like? Would it sound better being 'open' in a door?

Im thinking that could help with moisture etc. being its a SUV and I will be taking it to the mountain snowboarding lots and whatnot.

Thanks for the explanations

 

In general, not using one of those things is better. I have a friend that tried something like them, and it sucked. If you buy a "car speaker" moisture shouldn't be an issue.

 

I think those speaker baffles will work, but you will lose some low freq when trying to play the spkr athigher volumes, and it could actually suffocate the speaker instead. Unless you not putting too much power into it, it could sound just fine.

 

this can do the trick with a complet sealed box it sort of an aperiodic membrane


it's about 4 inches in diameter can be used for up to 8 inch speaker or you use 2 for bigger speaker

[ December 22, 2004, 11:56 AM: Message edited by: newfinish ]

 

^^^ From a guy that isn't too into theory, and more into practical experience, I thought you'd endorse my qualified personal opinion.

Oh well. You still amuse me Halo1.

 

Now this set-up looks ineteresting, if only Aliente would make a 6" woofer with a Flat Honeycomb membrane they use on all the bigger drivers.

That looks like a PERFECT membrane to mount behind your speakers. It won't suffocate the speaker as much...from my experience using AP pads from USD AUdio.

WHere did you find those? [img]graemlins/headbang.gif[/img]