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AV Galaxy => Planet Home Theater => Topic started by: wcseow on January 10, 2019, 01:03

Title: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 10, 2019, 01:03
After a year of listening to soundbar in my study room, 2m x 2.7m, itching to go individual speakers as not to satisfied with the soundbar sound.

The room is going to be pretty empty. Just the TV rack, sofa and the sound system. Definitely lots of echo.

Wondering whether putting normal curtains on 2 sides of the wall will work?

Thanks
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: desray on January 10, 2019, 07:38
After a year of listening to soundbar in my study room, 2m x 2.7m, itching to go individual speakers as not to satisfied with the soundbar sound.

The room is going to be pretty empty. Just the TV rack, sofa and the sound system. Definitely lots of echo.

Wondering whether putting normal curtains on 2 sides of the wall will work?

Thanks

Yes. It does. Must be thick
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wechnivag on January 11, 2019, 09:24
Thick curtains, and another trick is to have extra curtain length so it folds up, this is especially effective in corners to increase bass absorption. So if your wall is 2m, get 3m length of curtains or even more, and bunch them up at the corners for low frequency control.

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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: lampsy86 on January 11, 2019, 18:37
Thick curtains, and another trick is to have extra curtain length so it folds up, this is especially effective in corners to increase bass absorption. So if your wall is 2m, get 3m length of curtains or even more, and bunch them up at the corners for low frequency control.

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Fascinating information !!! Thanks

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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 11, 2019, 19:15
Thanks for the info.
I assume it is also better to have the height of the curtain to touch the floor?

Lol..window shopping at ikea for thick curtains on my todo list.
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wechnivag on January 12, 2019, 10:12
Thanks for the info.
I assume it is also better to have the height of the curtain to touch the floor?

Lol..window shopping at ikea for thick curtains on my todo list.
The ikea blackout curtains are good as they are heavy and have some membrane action too for bass absorption .

And very affordable comparatively. Yes, touching the floor is good. Corners (wall - floor) have more bass absorption.

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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: Jag on January 12, 2019, 12:36
I agree that good acoustic curtains reduce echo dramatically.
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: desray on January 12, 2019, 12:43
If can fully carpet the floor...even better :P
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wechnivag on January 12, 2019, 13:01
Curtains and carpets works pretty well for HT, but from strictly stereo perspective, one will find the mid high energy and ambience too significantly attenuated.

One way is perhaps to have the curtain in 3 sections on sidewalls so you can bunch it near the front corners, the midwall, and the back corner.. Leave some alternating reflective wall to preserve some energy. Can also vary curtain placement to fine tune the sound .

If sidewall full thick curtains , and floor full thick carpet, may have slight ear ringing effects, which is a sign the room is over absorbed. Also affects dialogue intelligibility.

Here's the next paragraph on carpets absorption properties. Thicker carpets, with thick liners or backing, will absorb more low range energy..

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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: andylovesaudio on January 12, 2019, 15:45
If I may ask ... what’s “ear ringing” effect? What does it sound like? Thanks
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: desray on January 12, 2019, 15:57
If I may ask ... what’s “ear ringing” effect? What does it sound like? Thanks

Pressure in your ear that builds up.



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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wechnivag on January 12, 2019, 21:58
Hmm, actually I was referring to the effect of too much mid high absorption, too quiet and the ears start to hear this high pitch ringing sound.

It doesn't seem to happen if the room has very low noise floor, but has diffusers treatment in addition to absorption..


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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 12, 2019, 23:54
If can fully carpet the floor...even better :P


Intend to put a carpet, ikea again lol, but will not cover the whole floor I gather, cause it is nicely parquet already....good to see some wood..lol
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 13, 2019, 00:00
One way is perhaps to have the curtain in 3 sections on sidewalls so you can bunch it near the front corners, the midwall, and the back corner.. Leave some alternating reflective wall to preserve some energy. Can also vary curtain placement to fine tune the sound .

If sidewall full thick curtains , and floor full thick carpet, may have slight ear ringing effects, which is a sign the room is over absorbed. Also affects dialogue intelligibility.


Interesting. Ikea sells curtains in pairs. So gets 3 sets will fit nicely...:)
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 13, 2019, 21:38
Just wondering do I need to put curtains behind the TV and LCR speakers?

Cant drape up opposite wall cause that is where the door is. Lol
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: desray on January 14, 2019, 06:29
Just wondering do I need to put curtains behind the TV and LCR speakers?

Cant drape up opposite wall cause that is where the door is. Lol

Your concept of thinking is wrong with acoustic treatment. Treat the basics first such as first reflection points. For instance, if you know one of the sides have a glass panel and the other side a concrete wall, put a thick curtain at the glass panel end. Lay the carpet. Run the system and then determine what u need further. You are putting the cart in front of the horse. No one can give you a correct answer without actually hearing what your “room has to say about it” first.

Don’t overdo it and only to find out that you wasted your time and money to do things that don’t require or make no difference in the first place.



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Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 14, 2019, 07:49
Thanks for the pointers.
Am trying to prep the room first before buying the stuffs thus like to do the "dusty" stuff like fixing up the rods, ceiling trunkings etc first.

The room is pretty much 4 walls, with a window on inge end and the door opposite. And its going to be pretty empty except for the AV eqpt and
Previously has a soundbar and it sounds "hollow" until I bring in sofas n tables, of which those are gone.
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: sigurros on January 14, 2019, 08:54
Thanks for the pointers.
Am trying to prep the room first before buying the stuffs thus like to do the "dusty" stuff like fixing up the rods, ceiling trunkings etc first.

The room is pretty much 4 walls, with a window on inge end and the door opposite. And its going to be pretty empty except for the AV eqpt and
Previously has a soundbar and it sounds "hollow" until I bring in sofas n tables, of which those are gone.

Bro, maybe a layout plan of your room will enable the bros here to assist with better visualisation of you planned setup.
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: ronildoq on January 14, 2019, 12:41
Thanks for the pointers.
Am trying to prep the room first before buying the stuffs thus like to do the "dusty" stuff like fixing up the rods, ceiling trunkings etc first.

The room is pretty much 4 walls, with a window on inge end and the door opposite. And its going to be pretty empty except for the AV eqpt and
Previously has a soundbar and it sounds "hollow" until I bring in sofas n tables, of which those are gone.

Using too much curtains to dampen the sound may make the room sound dead and dull. Wechnivag pointed out that some diffusion + absorption is good. That’s what he meant by saying diffusing mid highs. Meaning you wanna absorb the Low bass at the same time diffuse frequency in the mid range and higher frequency range so the room feels alive and yet sounds tight and controlled with bass due to the improved decay times. The experience and findings are similar.

 Ideally you could just head to a corner in your room, clap your hands. See if you can hear any flutter echo. If you can, then at least one of that wall needs to be covered or placed with bookshelves or anything that can diffuse , breakup or absorb the echo.

Desray also pointed out that windows is nasty for sound and ideally you would wanna place your curtains there, that’s a good starting point, glass and windows are your worst enemies for sound

Adding carpet will help, but may not be as significant as a thick curtain
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 14, 2019, 13:06

Here it is, hand drawn Sorry

TV be at the wall with the window, which already has a blind.

Will only allow the door to open sufficient to go in. Likely to have the armchair/sofa block it. A fellow bro here had suggested to change it to a sliding door, but decided against that as too much retrofitting.

I know is small but i guess it will be interesting to see how it turn out with the discrete speakers.

Still pondering on how could I squeeze in the ceiling/heights for atmos. Cant live without that after having it in my living room setup..Lol.

Thanks


(https://i.postimg.cc/hvm7n33V/20190114-124501.jpg)
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: wcseow on January 14, 2019, 13:22

 Ideally you could just head to a corner in your room, clap your hands. See if you can hear any flutter echo. If you can, then at least one of that wall needs to be covered or placed with bookshelves or anything that can diffuse , breakup or absorb the echo.


Thanks. It is a small room, so i gather will only have enuff room for gears like tv, avrs and speakers.
Title: Re: Does curtains on both sides of wall help reduce echo
Post by: synthesis on January 14, 2019, 13:43
Put more furniture/shelving etc. It will also help to reduce echo