Tiny Closet Space Recording Booth - Gearspace.com
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Tiny Closet Space Recording Booth
Old 4th June 2020
Tiny Closet Space Recording Booth

Now we have demolished a wall in the studio and will expand the large recording room a bit and build a vocal booth I hope you will find interesting!

It is in my nature to be driven forward by challenges. This thread:
Voice recording in PVC blanket booth, how to improve?
annoyed me when it was current, but also inspired me to try to get smallest room possible to sound good. Make the ”impossible” a reality, so to speak.

I actually have a wardrobe at home, of similar dimensions as the one in the thread mentioned above. We renovated the wardrobe recently, but my wife did not want her wardrobe acoustically treated and measured ;-)*

So when dresses and suits hung, neatly surrounded by modest wallpaper and skirting in linseed oiled teak, I used my spare energy to build up the ”same room" with similar dimensions in a big storage space I rent, for testing.

The booth is very tight space to be inside, during longer recording sessions, but one of the comments I got from the musicians was that "it feels like standing outdoors, talking in here”.

Width 130cm
Length 180cm
Height 240cm

But much smaller, after the acoustic treatment...

I think the result was really good. So now that we're going to change the room layout in our studio, we're going to build a similar vocal booth.

Feasibility studies make all the difference! :-)

The test booth has diffusers in the ceiling and on all four walls. HH resonators, adjustable and tuned (approx 70 Hz) in the ceiling corners. The diffusors are V-shaped so they create HH resonators between them.
No windows and no ventilation. I drilled a small hole in the wall to get electricity into the booth for a floor lamp and for the microphone cables. It has no door, but is closed by mounting the last wall with an electric screwdriver.

The booth I am building as a permanent installation in the coming summer, will have both ventilation and windows, a proper door. And of course, electrical outlets and lighting. It will be another challenge.

I want that, even if the space is small, it should acoustically cope with being in the booth for a whole day.

It feels fun to start sharing it all here.
Looking forward for feedback!
Also fun with issues and opinions that challenge and get the project developed. Here we go!

Follow the studio renovation here during the peculiar summer of 2020.

Last edited by Berndalen; 4th June 2020 at 10:46 PM.. Reason: Spelling
Old 7th June 2020
Lives for gear
JonesH's Avatar
4 Reviews written
🎧 10 years
Excellent results! It definitely doesn’t sound like a cramped booth. Very nice.
Old 10th June 2020
Gear Head
fonkyfork's Avatar
🎧 15 years
Sounds great! I'm usually not into vocal-booths but this is something different.
Almost like magic when you consider how small this booth is.
Old 10th June 2020
Thank you lads! Nice to hear your positive feedback!
Old 21st June 2020
Lives for gear
Grovestand's Avatar
That’s insane. If you could somehow manufacture and ship that as a flat pack (and maybe modify it to be tall enough to stand in) you would get a lot of orders!
Old 29th June 2020 | Show parent
Originally Posted by Grovestand ➡️
That’s insane. If you could somehow manufacture and ship that as a flat pack (and maybe modify it to be tall enough to stand in) you would get a lot of orders!
HA HA! Bam! Right on target. The package actually is flat.
I have the standard height. 120cm. But it´s possible to get them up to 240cm.
In my studio I have two stacked on each other. (Fits my room´s 270cm height, below the 30cm lowered inner ceiling).
Old 30th June 2020
Here for the gear
So doesn’t this go against all the advice I’ve pretty much ever read...?

So just to clarify it is possible to create a small ‘vocal booth’ that sounds ‘good’ or rather, like a far bigger space?
Old 18th July 2020
Old 19th July 2020 | Show parent
Gear Nut
🎧 10 years
Originally Posted by lonvoc ➡️
So doesn’t this go against all the advice I’ve pretty much ever read...?
it is largely due to that all other broadband diffusors on the market suffer from the same Achilles heel : The  distance to mix position and mikes must be  atleast 3-4  times   the   diffusor lowest working frequency wavelength to avoid ghost speakeras and combfilter effects
World-leading Jamie  Angus and David Howard's book  "Acoustics and Psychoacoustics"  describe    spot on  Berndalens   time delay diffusors  when used in   critical listening rooms  http://diffusor.com/PDF/angus-howard.pdf
A perfect GS example is Dr Hans  small mix room

The  modules  psychoacoustic  replaces the isd gap termination theory, which means that the ISD gap is filled with broadband-dense early reflections that increase resolution and have the big advantage of tracking and mixing in a neutral room
Sweden's studio designer living legend Ingemar Olsson ,who recently got the  very prestigious AES Fellowship Award *,  have used the nearfield diffusors  in over 200 projects  Nigel Jopson (Resolution Chief Editor) visit two of them in Stockholm  and was so impressed he offered SMT to publish the full story


* Its given to a AES member who had rendered conspicuous service or is recognized to have made a valuable contribution to the advancement in or dissemination of knowledge of audio engineering or in the promotion of its application in practice.

Last edited by diffusor.com; 19th July 2020 at 09:09 PM..
Old 7th September 2020 | Show parent
Originally Posted by lonvoc ➡️
So doesn’t this go against all the advice I’ve pretty much ever read...?

So just to clarify it is possible to create a small ‘vocal booth’ that sounds ‘good’ or rather, like a far bigger space?
Yep, it does. There are many norms here at GS that are starting to go a bit out of date, of course they still apply. But development is progressing. And my room here could be seen as a sign of this fact.

Now I just hope that my real room will sound as good as the test room ...!
Old 7th September 2020
The construction process continues.

The new room will have a different shape than the test room. But about the same volume.

Old 7th September 2020
The final challenge for my test room was to record a bass amplifier with room microphones.

!n order not to fall short in the choice of technology, I chose:

# AB spaced pair.

# The extremely revealing Thureson CM 402 in omni.

# The Straight Wire With Gain Preamp" Forssell SMP-2a

# Prism Titan ADC.

I'm glad I actually do not think I hear any direct room problems.

What do you think dear sound nerd colleagues?

Getting approved here on this forum and passing the listeners' eye of the needle would be an achievement worth its name.

Old 7th September 2020
Just have a question for you if you are kind to answer, is this room that you have just surrounded by the diffusers so no hard boundary behind?
Old 7th September 2020
The walls and ceiling of my room are built with a traditional construction of 2 x 4 inches wooden joists.

Excuse my word choice. But I do not know the technical terms for house building in the English language.
The joists/studs are screwed into a kind of thick masonite, which constitutes the mass and material of the wall. Walls and ceiling are composed in sections. Each section far too heavy for myself to lift, at most I could push them across the floor. Fortunately, an unbelievably large man works at the place where I built my room. He is as big (and strong) as the Swedish gladiator Roger Zapfe (which I have met at my gym...! Picture google him, and you'll see.

The room is almost airtight when I screwed on the door. The largest gap where air can come through, is the hole in the wall where I pulled through the XLR connectors to the microphone cables.

Inside the room I have stacked diffusers around all walls as well as the ceiling.
Old 13th September 2020
Here for the gear
🎧 10 years
On the recommendation of Berndalen I ordered four broadband diffusors.
Trying different placements in my small working space at home, the results have been very positive.

Currently, I have placed two diffusors on the sidewalls and two at the back wall.

The results I’m experiencing is that overall, the sound in the room cleaned up. There is more focus in my listening position and that makes it easier to work. They also have a positive effect on how the bass sounds.

I did a test and removed them from the room and that was not a pleasant experience. They are here to stay. My next step would be to put in more of these to see if I can further improve the sound.
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