help with further construction off cinema / music room sloped front and rear wall - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #31 of 78 Old 04-28-13, 04:19 PM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

While i was further studying room treadment, i found this:


Highly Directional Speakers (horns, rear-absorbed electrostatics, ribbon panels)
With more direct than reflected sound placement is usually easier. Electrostatics and
ribbons with wider horizontal dispersion require greater care in placement.
Spaciousness: fair to good
Localization: fair to excellent

Actualy i am using horn speakers, so it could be possible that afterall there simply is not enough reflected sound (ambiance, spacines) anymore...( complete frontwall, first and second sidewall reflection points are already treated.)
mikesp1 is offline  
Sponsored Links
Advertisement
 
post #32 of 78 Old 04-29-13, 05:48 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Well, i have my sound back!!! And i dont have t move to the front.

By turning the isolation ( i have a diffusor) in the first reflection zones so the aluminium is facing frontwards, i have my sound back, front stage is hugh, refind, voices are super, image is good, ambiance is greath and even bass and midbass are a lot better and refind.

One problem, i can hear the aluminium vibrate from time to times.

this is defenitly de way i have to go but need a solution for the vibrating aluminium.
if anyone as a solution i am curieus to know!
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-imag0020.jpg  


Last edited by mikesp1; 04-29-13 at 06:15 AM.
mikesp1 is offline  
post #33 of 78 Old 04-29-13, 08:17 AM
HTS Senior Moderator
 
bpape's Avatar
Bryan Pape
 
Join Date: Sep 2006
Location: Wildwood, MO (St. Loui
Posts: 5,288
Send a message via AIM to bpape Send a message via Skype™ to bpape
Re: help with further construction off cinema / music room sloped front and rear wall

remove the aluminum and cover with thin plastic - something like maybe 5 mil or so. That will still give you some highs back but be easier to stretch tighter.

Bryan

I am serious... and don't call me Shirley.

Bryan Pape
Lead Acoustician/Owner
Sensible Sound Solutions
bpape is offline  
 
post #34 of 78 Old 04-29-13, 09:04 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Bryan thanks again for the recommandation, will try it tommorow.
I also did a quick test and covered the isolation with mdf, it gave not the same result as with the isolation covered with aluminium, i think the latter diffuses more...gives also some mid absorption aswell.

Sometimes you can not follow the standards, trial and error...
mikesp1 is offline  
post #35 of 78 Old 05-02-13, 04:56 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Frontwall is almost done, i removed the resonating ply on the upper sloped ceilig and covered with fabric.
This made a huge difference!!!

In the second step i removed the resonating ply on the backwall aswell, behind the ply is 8" of isolation covered with plastic.

Soundwise this is even worse than before on the graph i can see that the huge dip on 120Hz has moved to 90Hz.

Should i cover the backwall less absorbing and cover with MDF or something?
Behind the lower backwall is some cavity, should i cover this also with MDF or use it later for maybe a pannel absorber?

Your help is much appreciated!
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-spl-ply-backwall-removed.jpg  

help with further construction off cinema / music room sloped front and rear wall-waterfall-ply-backwall-removed.jpg  

help with further construction off cinema / music room sloped front and rear wall-rt60-ply-backwall-removed.jpg  

help with further construction off cinema / music room sloped front and rear wall-frontwall.jpg  

help with further construction off cinema / music room sloped front and rear wall-ply-removed.jpg  

help with further construction off cinema / music room sloped front and rear wall-cavity.jpg  


Last edited by mikesp1; 05-02-13 at 05:11 AM.
mikesp1 is offline  
post #36 of 78 Old 05-02-13, 07:39 AM
HTS Senior Moderator
 
bpape's Avatar
Bryan Pape
 
Join Date: Sep 2006
Location: Wildwood, MO (St. Loui
Posts: 5,288
Send a message via AIM to bpape Send a message via Skype™ to bpape
Re: help with further construction off cinema / music room sloped front and rear wall

Is the last picture your rear wall?

Bryan

I am serious... and don't call me Shirley.

Bryan Pape
Lead Acoustician/Owner
Sensible Sound Solutions
bpape is offline  
post #37 of 78 Old 05-02-13, 07:41 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

yes, thats correct, 2 last pictures are rearwall
mikesp1 is offline  
post #38 of 78 Old 05-02-13, 08:00 AM
HTS Senior Moderator
 
bpape's Avatar
Bryan Pape
 
Join Date: Sep 2006
Location: Wildwood, MO (St. Loui
Posts: 5,288
Send a message via AIM to bpape Send a message via Skype™ to bpape
Re: help with further construction off cinema / music room sloped front and rear wall

By removing the ply, you've essentially uncovered the 'horn' in the rear of the room. I think the absorption in the rear is still a good thing. I would try some MDF on the REAR (hidden) side of the rear wall. Cover the front(exposed) side of the insulation with some 5-10 mil plastic and then fabric.

I am serious... and don't call me Shirley.

Bryan Pape
Lead Acoustician/Owner
Sensible Sound Solutions
bpape is offline  
post #39 of 78 Old 05-02-13, 08:10 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

Bryan,

"5-10 mil", do you mean milimeter?
mikesp1 is offline  
post #40 of 78 Old 05-02-13, 08:14 AM Thread Starter
Senior Shackster
 
Join Date: Oct 2012
Location: Belgium
Posts: 210
My System
Re: help with further construction off cinema / music room sloped front and rear wall

oh i see its 0.127 to 0.254 milimeter!

25,4 10-6 meter (0,0254 mm)
mikesp1 is offline  
Reply

Bookmarks

Tags
cinema , construction , front , music , rear , room , sloped , wall

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome