Acoustical Treatments Master Thread - Page 368 - AVS Forum | Home Theater Discussions And Reviews
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post #11011 of 11021 Unread 08-30-2015, 05:58 PM
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Originally Posted by HopefulFred View Post
What are the room dimensions - a diagram is often easiest/best.
The living room is 14.5ft x 16.5ft x 8ft with windows, door and open area to kitchen
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post #11012 of 11021 Unread 08-30-2015, 06:58 PM
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Okay, it doesn't look like those nulls are related to modal resonances. Instead, IMO, they look like single reflections from three separate nearby surfaces - spaced 60 inches away for the lowest frequency null, then 48 inches and 40 inches for each of the next two.

I'm still inclined to question whether or not they are actually audible.



If they are a nuisance, moving the listening position would be my first recommendation and absorption after that.
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post #11013 of 11021 Unread 08-31-2015, 05:32 AM
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I'm still inclined to question whether or not they are actually audible.
The Q looks pretty narrow so I would tend to agree.

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post #11014 of 11021 Unread 08-31-2015, 06:03 AM
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Originally Posted by HopefulFred View Post
I'm still inclined to question whether or not they are actually audible.
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Originally Posted by myfipie View Post
The Q looks pretty narrow so I would tend to agree.
in other words, which means I can ignore these nulls? please correct me if I'm wrong

I feel lack of those chest thumping mid bass

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post #11015 of 11021 Unread 08-31-2015, 07:47 AM
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Right. If you can't hear them, ignore them.

I'm not very confident in saying this, but I think you're looking at the wrong band if you're chasing chest thumping. That tends to be a little higher. If you have the system headroom, try some eq in the 120-150Hz neighborhood.
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post #11016 of 11021 Unread 08-31-2015, 08:09 PM
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I built several 703 panels and super chunk style bass traps, and I'm ready to finish them off and am wondering if I should cover them with something before applying the fabric. I see some commercial products that include a layer to reflect some of the high frequencies - which materials are recommended to mimic this type of effect? Would something simple like a layer of brown craft paper or pink floor protection paper do it or do they use much more advanced materials to get the acoustic effects?

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post #11017 of 11021 Unread 09-01-2015, 05:19 AM
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Originally Posted by HopefulFred View Post
The dip at 100Hz doesn't show up with 1/3 octave smoothing, so I would forget it. There's a good chance it is related to a standing wave between the floor and ceiling and will be tough to treat anyway. The ringing below 45Hz is unclear, since we don't see it tail off in your plot. If you can extend the time in the diagram, you may find that this is just your room's noise floor.
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post #11018 of 11021 Unread 09-01-2015, 10:26 AM
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Given how massive this thread has become, can anyone point me to a quick start guide to properly assessing acoustic treatment needs? I could start sticking that Corning stuff or foam all over my basement, but I really don't know what would actually help me.

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post #11019 of 11021 Unread 09-01-2015, 02:19 PM
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Originally Posted by pittsoccer33 View Post
Given how massive this thread has become, can anyone point me to a quick start guide to properly assessing acoustic treatment needs? I could start sticking that Corning stuff or foam all over my basement, but I really don't know what would actually help me.
start with REW measurement for your room
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post #11020 of 11021 Unread Yesterday, 05:52 AM
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Originally Posted by FriscoDTM View Post
I built several 703 panels and super chunk style bass traps, and I'm ready to finish them off and am wondering if I should cover them with something before applying the fabric. I see some commercial products that include a layer to reflect some of the high frequencies - which materials are recommended to mimic this type of effect? Would something simple like a layer of brown craft paper or pink floor protection paper do it or do they use much more advanced materials to get the acoustic effects?
Yes using something like craft paper will work. Keep in mind though you do not want panels with a membrane (the craft paper) in the any of the early reflection points.
http://www.gikacoustics.com/video-ea...ection-points/

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post #11021 of 11021 Unread Yesterday, 05:55 AM
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Quote:
Originally Posted by pittsoccer33 View Post
Given how massive this thread has become, can anyone point me to a quick start guide to properly assessing acoustic treatment needs? I could start sticking that Corning stuff or foam all over my basement, but I really don't know what would actually help me.
All small rooms need lot of bass trapping in corners, so that is a given. Testing is great way to see the progress but also great for making sure you have the speakers set up right also. Here is a video on using REW.
http://www.gikacoustics.com/room-eq-wizard-tutorial/
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