Building bass traps into the ceiling?

Jul 24, 2017
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#1
Has anyone got experience of building bass traps into the ceiling? We're about to replace our listening room ceiling (that is also our living room), and wondering if I should consider integrating some sound treatment at the same time. Am specifically looking at treating a 50Hz peak in a room ~11m x 5m.
 

spiritofmusic

Well-Known Member
Jun 13, 2013
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E. England
#2
Heihei, please keep me posted on this.

I've been investigating Acustica Applicata panels, and one use is to install EcoDaads on my descending eaves R and L at 0.6m gaps.

That would be up to 40 in my room at £250 each.
 

JackD201

[WBF Founding Member]
Apr 21, 2010
11,232
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Manila, Philippines
#3
Go for it if you've got the airspace between ceiling and slab. I've got tuned resonators on the rear ceiling of my listening room. It's a great way to save precious floor space.
 

christoph

Well-Known Member
Dec 12, 2015
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Principality of Liechtenstein
#4
Has anyone got experience of building bass traps into the ceiling? We're about to replace our listening room ceiling (that is also our living room), and wondering if I should consider integrating some sound treatment at the same time. Am specifically looking at treating a 50Hz peak in a room ~11m x 5m.
How high is your ceiling?
Unless you have a very high ceiling AND are willig to sacrifice a LOT from that height, you will never be able to tame a 50 Hz Peak with the ceiling alone.
Sorry to be the party pooper in this :oops:
 
Last edited:

bonzo75

Member Sponsor
Feb 26, 2014
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London
#5
Marty has got helmholtz resonators in his ceilings, PM him if he doesn't read this
 
Jul 24, 2017
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27
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#6
How high is your ceiling?
Unless you have a very high ceiling AND are willig to sacrifice a LOT fro that height, you will never be able to tame a 50 Hz Peak with the ceiling alone.
Sorry to be the party pooper in this :oops:
Yep recognise this, but it may help the overall room acoustics to have some broader bass damping in the ceiling, and then address the specific nodes with dedicated solutions elsewhere. Am intrigued by the new Artnovion Eiger bass traps, which can be tuned down to those levels, for example.
 
Likes: christoph

christoph

Well-Known Member
Dec 12, 2015
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Principality of Liechtenstein
#7
Yep recognise this, but it may help the overall room acoustics to have some broader bass damping in the ceiling, and then address the specific nodes with dedicated solutions elsewhere. Am intrigued by the new Artnovion Eiger bass traps, which can be tuned down to those levels, for example.
That is certainly a good idea.
The acoustic ceiling in my cinema room brought down the reverb time immensely :cool:
 

spiritofmusic

Well-Known Member
Jun 13, 2013
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E. England
#8
Can we broaden to discussion to ceiling treatments as a whole. There's plenty of discussion of diffusion on front wall, cnr bass traps, addressing side walls reflection points. But next to nothing on ceiling-mounted treatments.

My 5.5m x 14.5m room is pretty natural sounding, but my ceiling could be a challenge w midline apex ht above my head of 3m sweeping down R and L at 30° to meet at side walls 1.3m high (over the 5.5m total width).

A provider of treatments is convinced these eaves can only be bad for sound, and his solution is to treat at 0.6m seperation w absorbers/diffusors, amounting to 30-40 1.3m x 0.25m panels.
 

tcdk

New Member
Oct 25, 2010
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#10
Has anyone got experience of building bass traps into the ceiling? We're about to replace our listening room ceiling (that is also our living room), and wondering if I should consider integrating some sound treatment at the same time. Am specifically looking at treating a 50Hz peak in a room ~11m x 5m.
Has anyone got experience of building bass traps into the ceiling? We're about to replace our listening room ceiling (that is also our living room), and wondering if I should consider integrating some sound treatment at the same time. Am specifically looking at treating a 50Hz peak in a room ~11m x 5m.

I have built 1/4 wave bass traps into the ceiling of my listening room (which is in my basement). There is a reasonably solid floor above the joists and the joists run the long length of the room. Merely block between the joists to form appropriate length "tubes" when the ceiling is installed, add some loose absorbing materials, install the ceiling except for openings at the ends of the formed "tubes". If you block in the middle and leave openings at each end of the room you end up with absorption at the room longitudinal resonant modes. I used low density fibreglass panels to cover the ends. Also you should add absorbers at the ceiling first reflection areas.
Tony
 
Likes: heihei

marty

Well-Known Member
Apr 20, 2010
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Far Hills, NJ
#11
Marty has got helmholtz resonators in his ceilings, PM him if he doesn't read this
I installed 4 Helmholtz bass traps into my ceiling. I looked at the physics for weeks before I did the construction and realized that no matter what I was planning to do, there was no way to do it correctly, which is namely, to measure the room resonance frequency first, and then plan a device to eliminate the resonance according to as specific set of calculations regarding the volume and port sizes of the device. Unfortunately, what I was left with as the only pragmatic solution was basically to build them when I built the room, pray, and hope like hell they would work. I got lucky. Very lucky. But that was only because I had some experience with the nearly identical room I built in Dallas prior to moving to New Jersey where I built a replica of the Dallas room. Obviously I would not recommend my approach in general. However, in researching commercially available Helmholtz resonators, I did find a product that I think offers some tremendous advantages in that they can be tuned easily for a particular room. This seems like a reasonable and cost effective approach to consider.

http://arqen.com/store/vicoustic-vari-bass-helmholtz-resonator/
 
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Ron Resnick

Site Co-Owner, Administrator
Jan 25, 2015
6,145
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Beverly Hills, CA
#12
Marty, do you happen to know
how the efficacy of this Arqen device compares to the efficacy of the SMT Varitune?
 
Jul 24, 2017
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#14
The Vicoustics website suggests I would need 16 of these for a room 55m2!!
 

Mike Lavigne

Member Sponsor & WBF Founding Member
Apr 25, 2010
7,435
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#15
Has anyone got experience of building bass traps into the ceiling? We're about to replace our listening room ceiling (that is also our living room), and wondering if I should consider integrating some sound treatment at the same time. Am specifically looking at treating a 50Hz peak in a room ~11m x 5m.
my whole drop ceiling was one huge bass trap. pictures of my room show inset chambers and then dropped areas. the walls of those drops were open behind the fabric coverings.

over a 7-8 year period i slowly closed up all the openings.

the last step was 3 years ago when my speaker designer measured the room and found a narrow 10db suckout around 30hz, his opinion was that it's cause was the remaining ceiling openings mid room. 6 months later my son and i closed those openings and magically the 10db suckout was gone. which forced me to completely re-adjust my active bass towers.

so careful what you wish for.
 

spiritofmusic

Well-Known Member
Jun 13, 2013
7,801
600
113
E. England
#16
The Vicoustics website suggests I would need 16 of these for a room 55m2!!
Heihei, the Acustica Applicata dealer advice is to install 40 EcoDaads absorber/diffusers on my eaves at total cost of £10k!!!

That's in addition to the ones on the walls totalling £15k
 

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