Speaker coloration behind screen? - AVS Forum
Forum Jump: 
 
Thread Tools
post #1 of 4 Old 12-29-2012, 09:44 PM - Thread Starter
Newbie
 
alanca3's Avatar
 
Join Date: Jul 2011
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I plan on installing an acoustically transparant screen in my next media room, but one thing concerns me.
I'm not worried about the screen its self attenuating the sound, I'm worried about the small room in which the two subwoofers and other main speakers are. Will the room behind the screen color the sound? If so, how large or small should it be? I'm not really concerned about the screen, but will it effect the sound aswell? I plan on using Golden Ear speakers. Would my sound be better off in a normal setup? Thanks in advance!
alanca3 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 12-30-2012, 06:12 AM
AVS Addicted Member
 
arnyk's Avatar
 
Join Date: Oct 2002
Location: Grosse Pointe Woods, MI
Posts: 14,387
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 762 Post(s)
Liked: 1175
Quote:
Originally Posted by alanca3 View Post

I plan on installing an acoustically transparant screen in my next media room, but one thing concerns me.
I'm not worried about the screen its self attenuating the sound, I'm worried about the small room in which the two subwoofers and other main speakers are. Will the room behind the screen color the sound? If so, how large or small should it be? I'm not really concerned about the screen, but will it effect the sound aswell? I plan on using Golden Ear speakers. Would my sound be better off in a normal setup? Thanks in advance!

The so-called acoustically transparent screen will cause some kind of minor dampening of high frequencies that can probably be measured. Nothing is perfect.

Furthermore these screens vary so they are not all exactly alike.

It will probably be possible to do a sighted evaluation showing that the screen adds some umm veiling to the sound.
arnyk is offline  
post #3 of 4 Old 12-31-2012, 12:04 AM
AVS Special Member
 
Glimmie's Avatar
 
Join Date: Sep 2000
Location: Los Angeles, CA
Posts: 8,016
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 180 Post(s)
Liked: 250
Another problem with perforated screens. The DLP or LCD projector has a pixel grid. A perf screen has a grid but at a different pitch. Now if you hit a sweet spot with distance and focus, you can get a beat frequency which will appear as moire. This phenomena is more likely in small home theaters.

Light is no different than sound or electrical energy in this respect. Two frequencies beat against each other will produce a third. It's called hetrodyning.

I don't think it's that common but there have been some threads reporting it over on the projector forums throughout the years.

Glimmie's HT Page
Being redone - comming soon!

Glimmie is online now  
post #4 of 4 Old 01-11-2013, 01:10 PM
Advanced Member
 
mraub's Avatar
 
Join Date: Jul 2001
Location: Champaign, IL
Posts: 863
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked: 15
You'll find more information on this in the screen forums, but there are 2 basic types of AT screens--solid plastic with a whole bunch of small holes punched in it and woven fabric screens. As usual both have pluses and minuses. Most fabric screens offer no gain while solid plastic screens tend to attenuate high frequencies more. I ended up with a fabric screen which I am happy with. However, I have a very bright projector and my screen is not all that huge, compared to some.

MIKE

For every complex problem, there is a solution that is simple, neat, and wrong.
--H. L. Mencken
mraub is offline  
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