ducts and vents - see pic

  • Thread starter Thread starter mncheetah
  • Start date Start date
Trying our best to manufacture noiseless ducting

'mncheetah' & 'gidman' :)

Sorry I didn't see your replies until recently......

Well thanx for responding :)

'mncheetah'
What phase of construction are you in now? Have you fired up the system yet? How is it working out?? Any noise? Any restrictions in the supply or return as a result of your design?

And I see that 'gidman' also addressed this issue of creating a minimum noise duct system........

But 'gidman' (senoir member), can you provide any photos as
mncheetah did illustrating his design??

You mentioned:

"hard board duct and baffles will be an option." (since I have NO room for S turns in the duct )

"I had flex duct in the attic and put hard board toward the ends of the ducts, and I installed 4 baffles in them staggered about 6" apart on the last 2 feet of the duct. One receiver in each room, two in the control room, return duct in the hall. I keep the
receiver directed at the wall to keep them from blowing onto any mics. For the return air I left enough space under the door to let the air return. The doors to the rooms are about 6' apart and connect through a hall way. I haven't had any problem with sound bleeding or whoosing noises."

I'm thinking about copying mncheetah's design (his photos were VERY ILLUSTRATIVE)

And in my situation, I will probably have conventional feeds and returns in each isolation room. But perhaps I can take your advice and direct the feed toward the wall (locate the feed port near the wall) (away from the mics) yes?

How would you compare your system of baffles (above), to what
mncheetah showed here:
http://www.homerecording.com/bbs/attachment.php?postid=385412

I can easily see his design - and copy it ...........

Would you be able to show me photographically what you're talkng about too?

Thank you - 'mncheetah' & 'gidman'

Mike
rocknroll@ucwphilly.rr.com
 
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baffles

No sorry I didn't take a pic when I built them.
I couldn't get a quick diagram to show up right on here so I emailed you.


Gidman
 
The Duct Controversy - Narrowing it down!

Hey gidman thanx for your email ......... :)

And perhaps we'll hear back from mncheetah soon .......... :)

For anyone else who may have been reading these posts on duct design - just to bring you guys up to speed:

It appears both mncheetah & myself have LIMITED space and perhaps a limited budget as well .......
So in regard to the DUCTLESS system described several threads above - I've already checked into it thoroughly - and it is out of my price range........

SOOOO - considering that I WILL go with a conventional ducted system, it seems I'm narrowing the design down to mncheetah's OR gidman's system........

HERE'S THE STORY:
After you guys read this latest thread, perhaps I can narrow it down even further........
(And please guys bear in mind that I'm a BOCA certified Construction Inspector - so SAFETY is my business) :)

I like mncheetah's design as pictured here:
http://www.homerecording.com/bbs/attachment.php?s=&postid=385412

But after looking at gidman's diagram, it looks as though his system is not as room invasive as mncheetah's - it appears to STILL REMAIN (above in the cieling) - where mncheetah's feed duct ports drop down within the wall and somehow need to be directed AWAY from a DIRECT path straight at ya ...........
(Unfortunately My head room per room is only 6' 7") know what I mean??

I'm gonna have 3 isolation rooms in total, and all are about 7.5' X 9' each ...........(IT'S JUST A HOBBY STUDIO)

SOOOOO as gidman drew his rough plan here:

------------ll----------------ll-----------------ll----
ll ll ll
ll ll ll ll ll ll
ll ll ll to receiver -->
-ll-----------------ll----------------ll------------

*Note the baffles constructed within the hard board box to help DEFLECT sound BEFORE the air EXITS into the room...

(I still have to find out exactly how and what material he used)

It appears that (as he descirbed), he keeps this construction above and at the end of his flex duct BEFORE it channels into the Feed Port within the room - YES????

*This type of arrangement in regard to both the return and feed might be more condusive for my applications..... ???

Feel free to comment ........ :)

And thanx to all
Mike
rocknroll@ucwphilly.rr.com
www.locationstudio.net
 
Gidman's diagram

gidman ...........

Sorry about your diagram - apparently the HTML didn't replicate it completely by copy n paste methods.........

But anyway, his baffles are actually STAGGERED throughout the interior of the hard board box which he uses at the ends of the flex feeds.........

Right dude?

ok - well we'll get it right .........

Mike :)

rocknroll@ucwphilly.rr.com
 
Baffles

Your right. The placement of the marks on the top and the bottom, are the places where the baffles would be, staggered. Each baffle extrude about 3/4 of the way through the inside of the duct.
I don't remember what the hard board was called but it was silver on one side and yellow insulation on the inside and 1/2'' thick.

Thats why I mailed you my little diagram because it didn't transfer well into html.

Gidman
 
gidman's design

Hey my friend gidman ..........

Did you read my post comparing your ducted system to mncheetah's?

Would you care to respond to my comments in regard to what I said ??

Does it seem like I have an idea on how you designed your duct system?

Perhaps I can draw a diagram concept on how I think you laid it out and send it to you - that way you can tell me if I'm right or wrong?

cool?

thanx again
Mike
 
Well so far I've gotten the main live room fully vented (supply and return) and it as far as the noise of the air coming out is concerned, I feel the air, but I hear nothing. I still haven't gotten to the point of drywalling yet, do I can't tell what the sound transmission will be like through the duct and walls and such. I've cranked up a radio on an upstairs vent and put my ear up to the vent I made, I can hear it, but this is not a fair test considering I'm hearing alot of it through the floor. So I wont fully know the result until the drywall is up.


This weekend I will be picking up the Resilient channel and mineral wool and drywall. I have gotten the lighting all done (recessed lighting on dimmers, separate circuit for each room), I still have to run the electrical cable for outlets and audio cable for the XLR and TRS wall plates that I will be getting. Oh yeah, I still have to caulk the hell out of the ceiling joists- is there a special caulk I should be using, there's about 20 different kinds of caulk at home depot - what should I use?

It will still probably be a couple weeks until I'm done with drywall for this room, but I'll let you guys know how it turns out.
 
Hey mncheetah !!!

Thanx for responding .......... :)

Listen dude be real careful as to the installation of dimmers ....
Scroll down to the bottom of this page under electrical issues........
http://www.acoustics101.com/components_gateway.htm

AND have you already cut out for the recessed lighting - cause if you're concerned with keeping sound 'WITHIN' - it's always best to use SURFACE MOUNTED FIXTURES with a tiny hole for the cable (but this would mean that junction boxes would be above) .... and perhaps not accessible......

AND about the caulking ANY good grade latex caulking is fine.......

CAULK EM ALL UP DUDE ........

Keep in touch PLEASE :)

thanx
rocknroll@ucwphilly.rr.com
 
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