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Discussion Starter · #1 ·
OK, I took care of the sound proofing (as good as it needs to be) to keep the neighbors and family happy so now it's time for me!


I reviewed several thread here but am still lost. How do I start?


The room is 24X19 with two windows on one long side and two French doors on the other "long" wall. On the wall the speakers will be on (short wall) is one window. The 4th wall is all wall.


This is strictly for two channel listening, the main function of the room.

It will also have a TV and separate two channel system on the "4th wall" but I am not concerned with the sound quality for this. (I am not a movie guy, the TV is for sports)

So I will have a seating area for the TV and a chair for two channel listening facing the opposite wall.


What do I need to consider?


As you can tell, I don't even know what questions to ask yet.


Get me started, thinking at least about acoustical treatments.
 

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Discussion Starter · #2 ·
bump
 

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cdy2179 posted good links for you.


Note, this is the "Dedicated Theater Design & Construction", usually involves multi seating and compromise because there is not just 1 MLP, you are asking for a 2 channel listening room solution, which I take it means a single MLP is all you care about.


Concepts are same, but solution for you may/be different than a HT room solution.

I'm no expert, but for 2 channel I might try an approach dealing more with diffusion than absorption, based upon what I've read.


You might get better advice in the 2 Channel Audio forum. http://www.avsforum.com/avs-vb/forumdisplay.php?f=173


I made this post in another thread, re-post here:
Quote:
Side note:

I have this general suggestion for those wanting to learn about acoustics:


A) read this 3 page thread Acoustic Treatment basic FAQ , its a easy read in layman terms, good foundation with practical discussion.


B) Then I'd say read the first 4-5 pages of Acoustical Treatments Master Thread , there are 200+ pages there but first 4-5 cover much of the stuff


C) Then, post into link given in B your room size/etc and ask your Q's there, if not already answered by doing A) and B) above


D) If you have desire for more knowledge:

-read one of many books out there, a great 1st book is "Master Handbook of Acoustics" by F. Alton Everest

-study Ethan Winers site, http://www.ethanwiner.com/acoustics.html

-This is also a 101 read on Room Acoustics, http://www.crutchfield.com/learn/lea...acoustics.html

-I was surprised at this SAE Home Acoustics info site http://www.sae.edu/reference_materia.../fullindex.htm

-There are many other sites on the web, like http://forum.studiotips.com/index.php , acoustical measurements defined http://www.positive-feedback.com/Issue12/rives2.htm , http://www.rpginc.com/news/library.htm , etc.

-Be careful of info overload all at once
 

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Discussion Starter · #5 ·
Great info, thanks.


The way I read all that, I only need acoustical treatments for the side walls and ceiling. Correct?


No base traps or treatments on the front or back wall.


???
 

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Quote:
Originally Posted by eljr /forum/post/20837476


The way I read all that, I only need acoustical treatments for the side walls and ceiling. Correct?

Mmmmmm...not correct IMHO.
You are going to need to deal with the rear and front walls as well.
 

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Discussion Starter · #8 ·
Quote:
Originally Posted by SierraMikeBravo
Mmmmmm...not correct IMHO.
You are going to need to deal with the rear and front walls as well.
http://www.realtraps.com/art_room-setup.htm


This diagram shows no Bass traps, front walls and mentions that in large rooms rear reflection is not a problem.


(2 channel set up)


I am questionming because it does not sound correct but it would save me money.
 

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Quote:
Originally Posted by eljr
http://www.realtraps.com/art_room-setup.htm


This diagram shows no Bass traps, front walls and mentions that in large rooms rear reflection is not a problem.


(2 channel set up)


I am questionming because it does not sound correct but it would save me money.
to be fair, that link is discussing issues in the specular domain - so 'bass traps' are not applicable.


the primary focus of that article is placement, and first-reflection-point discovery. a decent 'primer' for the novice. not meant to be a full blown technical doc (Ethan's link here does a good job of that: http://www.ethanwiner.com/acoustics.html )


Quote:
Originally Posted by eljr
I am questionming because it does not sound correct but it would save me money.
every room is different and has specific (hopefully, measured) issues that can be solved in a variety of ways. there is no single right answer or solution.


the specular area is fairly obvious (how to attack, if your design requirements are to indeed attenuate 'early reflections) ... but for LF modal issues, it's difficult to do anything without measurements. speaker/listener placement will be most important to find the best response ('starting point') - and then individual issues within the LF modal region can be addressed with porous velocity-based or pressure-based 'traps'.


it's best to start with identifying known issues within one's room before blindly choosing solutions. there are general guidelines, of course, in small acoustical spaces....
 

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Discussion Starter · #11 ·
So in that room as diagrammed (virtually identical to my own) what else would be needed generally speaking in reference to acoustical treatments?


Bass traps? where? far wall? behind stereo?


I need general knowledge before I can zoom in.
 

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Quote:
Originally Posted by eljr
So in that room as diagrammed (virtually identical to my own) what else would be needed generally speaking in reference to acoustical treatments?


Bass traps? where? far wall? behind stereo?


I need general knowledge before I can zoom in.
take a look at the link in my previous post. it is in-depth but easily digestible for the newcomer.


it's essential to understand how porous insulation 'absorbs' in the first place, so you can understand how porous 'bass traps' need to be constructed (material, thickness, spacing from boundary, etc) and where they need to be placed in order to maximize effectiveness.
 

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eljr;


Simply, are you willing to take acosutic measurements and post those?

(please, also post a layout of your area, with overall dimensions, seating location, speaker locations, etc, it helps)


If so, with detailed layout + data (graphs) then people can look at and give feedback, and you can DIY or buy specific what you need.


If not, then best advice is pay some consultant to analyze your situtation and give you their direction on what to buy, where to place it, etc.
 

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Discussion Starter · #14 ·
stereo goes under this window
 
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