Acoustic absorption behind screenwall - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 7 Old 06-17-2019, 03:43 AM - Thread Starter
Member
 
Bruach's Avatar
 
Join Date: Apr 2008
Location: Hamilton, Australia
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 22
Acoustic absorption behind screenwall

Hi folks

So im in the process of building a new theatre room witg a 150" spandex cinemascope screen. The screen wall is 800mm off the end wall and the room dimensions are 5.2m x 8m.

I am looking for a solution to treat the wall behind the screen for sound absoption.

The goto diy material in the theater build forum is linacoustic. 2 layers with plastic in the middle for max low frequency absoption.

I cant get my hands on linacoustic in oz and have struggled to even find a duct insulation alternative. So Im thinking of using some rockwool bats or blanket and covering it with black carpet. Can anyone comment on the use of carpet for sound absorption, taking into account it is coupled with 50mm rockwool bats and will be 70mm off the wall.

Sent from my SM-N960F using Tapatalk
Bruach is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old 06-17-2019, 05:42 AM
AVS Forum Special Member
 
SteveCallas's Avatar
 
Join Date: Jun 2004
Posts: 8,027
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 680
Can you get 4” wedge acoustic foam? Its absorption properties measure quite high despite what misinformation has been posted in the past.
SteveCallas is offline  
post #3 of 7 Old 06-17-2019, 07:45 PM - Thread Starter
Member
 
Bruach's Avatar
 
Join Date: Apr 2008
Location: Hamilton, Australia
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 22
Quote:
Originally Posted by SteveCallas View Post
Can you get 4” wedge acoustic foam? Its absorption properties measure quite high despite what misinformation has been posted in the past.
I can source acoustic foam on ebay but didn't think it was any good. I have some that is very light weight so just assumed it wouldn't absorp much. Maybe i should test it.

Anyone know how I can setup a test? I have a dayton mic and have played with rew a little in preperarion for room testing.



Sent from my SM-N960F using Tapatalk
Bruach is offline  
Sponsored Links
Advertisement
 
post #4 of 7 Old 06-17-2019, 08:01 PM
AVS Forum Special Member
 
SteveCallas's Avatar
 
Join Date: Jun 2004
Posts: 8,027
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 739 Post(s)
Liked: 680
I dont know about stuff on ebay, but foam factory had theirs tested
SteveCallas is offline  
post #5 of 7 Old 06-19-2019, 02:11 PM
AVS Forum Special Member
 
ScottAvery's Avatar
 
Join Date: Mar 2002
Location: Great Falls, VA
Posts: 1,646
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 629 Post(s)
Liked: 182
at 800mm you could use full bales of insulation still wrapped in plastic. Stack two high in each corner, at minimum, for a floor to ceiling bass absorber.
ScottAvery is offline  
post #6 of 7 Old 06-19-2019, 02:21 PM - Thread Starter
Member
 
Bruach's Avatar
 
Join Date: Apr 2008
Location: Hamilton, Australia
Posts: 84
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 21 Post(s)
Liked: 22
Quote:
Originally Posted by ScottAvery View Post
at 800mm you could use full bales of insulation still wrapped in plastic. Stack two high in each corner, at minimum, for a floor to ceiling bass absorber.
Yeah good idea i was definetely going to do this in the corners but i hadn't considered leaving them in the bags.

I wont have that room all the way across with the speakers and subwoofers in place so I'm looking at treating the wall right across.





Sent from my SM-N960F using Tapatalk
Bruach is offline  
post #7 of 7 Old 06-19-2019, 02:35 PM
AVS Forum Special Member
 
ScottAvery's Avatar
 
Join Date: Mar 2002
Location: Great Falls, VA
Posts: 1,646
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 629 Post(s)
Liked: 182
Quote:
Originally Posted by Bruach View Post
Yeah good idea i was definetely going to do this in the corners but i hadn't considered leaving them in the bags.

I wont have that room all the way across with the speakers and subwoofers in place so I'm looking at treating the wall right across.





Sent from my SM-N960F using Tapatalk
Yeah, for that I used duct liner which you said you cannot find. Maybe the locals just call it something different.
ScottAvery is offline  
Sponsored Links
Advertisement
 
Reply Audio Theory, Setup, and Chat

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


Forum Jump: 

Posting Rules  
You may not post new threads
You may not 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 code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off