Welcome Guests and Members

WELCOME VISITORS AND NEW MEMBERS!

Login to:

  • View Attachments and Other Features
  • Post Topics
  • Reply to Posts
  • Access the "Give Away of the Day" - Below the Shoutbox
  • Share tips and good company

Login          Register


gmhCafe Shoutbox

Last 15 Shouts:

 

Maureen

October 28, 2017, 11:58:33 PM
Welcome back Larry.  :)
 

LarryKillam

October 20, 2017, 12:42:09 PM
Hey I'm Back
 

Glenn

April 24, 2017, 03:07:14 AM
Hey all, hope you have a good one!  :)
 

Maureen

April 21, 2017, 09:54:15 PM
Hi Pete - Post your questions in the forum.  We finally have reasonable internet, and will be stopping by more often. :)
 

petenoak

April 04, 2017, 07:34:27 PM
Forums pretty inactive. What's the best way to ask some easy questions re Audacity?? ;)
 

petenoak

April 04, 2017, 07:31:26 PM
Oops! Yes, I haven't checked back in a few weeks. Got some questions. :D
 

Maureen

April 03, 2017, 12:33:05 AM
The snow is leaving - uncovering the ground.  Time to start planning the garden.  :)
 

way2lon

March 14, 2017, 06:16:03 AM
This months April challenge is up following lst years April Challenge. http://www.gmhcafe.ca/gforums/index.php?topic=1570.new#new
 

Glenn

March 12, 2017, 05:40:31 PM
Hey Pete, yes... back online and getting re connected, great to see you here.  :)
 

petenoak

March 12, 2017, 02:34:12 PM
Welcome back to the 'grid'!
 ;)
 

Glenn

March 11, 2017, 10:55:32 PM
HEY ALL ... just 'shouting' out that we're back!!!! great to be here.  Hoping all is well.  :)   8)
 

Maureen

March 11, 2017, 04:55:49 PM
Hi everyone!  :)  Hope all is well.  We're finally set up in our new home.  Over the next few days we'll be online catching up and posting about our adventure.  
 

Glenn

January 26, 2017, 04:28:58 PM
Just stopped by to say "Hey" from the library... hoping to have the net set up at home soon.  :)
 

Agradeleous

September 24, 2016, 10:29:46 AM
Good Saturday morning ;)
One pot of coffee down now to work it off lol
I'm going to post a song nut by me though I wish but I think many will like check it out and have a great day ;)
 

Agradeleous

September 22, 2016, 02:50:51 PM
Hey I see lots guests do I thought I'd say hello . Your all welcome join up and share music or love of outdoors , coffee''s on :)

Show 50 latest

Author Topic: The 'sleeping bag' audio booth  (Read 1597 times)

0 Members and 1 Guest are viewing this topic.

Offline way2lon

  • The Crew
  • Commited Poster
  • *****
  • Posts: 505
  • Karma: 12
  • You are not punished for anger but by it.
The 'sleeping bag' audio booth
« on: August 29, 2015, 11:39:25 AM »
I was looking for some audio damping to get rid of some of the boom from my walls which are bare plaster.
The frame is a build it yourself garden protection frame which is meant to hold netting. Instead it's wrapped in a sleeping bag which is one of those very thick and warm ones. The mic is inside the booth as is my little stool which i sit on.
I control everything with a wireless mouse and can see my PC screen on the left.
The only problem is I need to sit down and it also gets quite warm in the good days we may have.
In any case it works after a fashion. I love to have a professional studio vocal booth but have you seen some of the prices for even the soundproof material? Anyhow, I thought you might be interested and have some ideas yourselves or can maybe copy mine.
The song is just one that I know and can chuck out in one go for the camera.
Any comments or suggestions (of a decent nature) would be welcome.
REAL STUPIDITY BEATS ARTIFICIAL INTELLIGENCE EVERY TIME

Offline Glenn

  • Alpha Wolf (when she's not around...lol)
  • The Crew
  • Commited Poster
  • *****
  • Posts: 2323
  • Karma: 21
  • Music and Nature's Harmony
    • gmhCafe
Re: The 'sleeping bag' audio booth
« Reply #1 on: August 29, 2015, 02:29:42 PM »
I've never noticed any boominess from room acoustics entering your mic Dave! Perhaps the music tracks help mask it, or you've EQ'd it out in the past.  8)

do what works for ya!   cool little set up!   ;D

I have a bit of experience with taming room acoustics and standing waves from recording spaces, and I've tried many approaches, from money saving points of view and from 'quality, get the job done' point of view too.  8)

Over the years, I've researched, designed and built a few studios from scratch, wanting to make sure the investment was going to pay off, I wanted to do it 'right' the first time.

When I first started recording, before I built my own studio, I once made a booth from huge refrigerator boxes... wired two together, cut the inside dividing walls out, put a light in there, lined it with shag carpet inside and out, and cut a small hole through it to put a mic in there, and a stool.   This was VERY confining, and created a very dead sound!  ::)  It served the purpose though.

To catch mids and high end standing waves ....
 I found out I could achieve the same or better results than making a confined booth, using the space of the room itself, and dampening only certain frequencies, (mids and highs) with some soft cushions strategically placed in the corners, and some curtains hung on the walls.  You could also frame a piece of shaggy carpet and hang it on the wall.  But don't expect this to deaden or cancel room boominess! 

I once mounted thick carpet on 2 sheets of plywood 4 X 4 ... and then stood them up against each other in a V shape, placing the mic in the center of the "V" to stop the mids and highs from rolling around and back into the mic.  This works well too. You can make a mini one and place it on a desk where your mic is and have pretty good results that way too.

Forget using egg crates or cardboard...  stapled to ceilings etc ...

the main thing is to break up the hard flat surfaces... that's key. IMO

To dampen room boominess.... 
The soft surfaces will only work on the mid and high end, ... the bass is an entirely different animal, and needs special attention to attenuate the bass freqs from rolling around the room... and indeed from exiting too... especially if you're using a bass amp, or speakers with a sub woofer.
Bass standing waves can be more than 35 Feet wide and high.. 10 meters or more... that means they travel through walls and ceilings like they aren't even there! 

Of course, the boominess from a voice isn't quite so drastic because it's not as loud or as low as a sub woofer, but the principal is the same!   You want to stop the bass freqs from rolling around the room and bouncing back into the mic.

I suggest looking up 'bass baffles' which you can build yourself ... the measurements are most important to catch specific freqs to REALLY dampen the BOOMY Bass standing waves.  You should only need two to four baffles depending on the size of the room.

You don't need a special tent, as I learned years ago. 
Sometimes it's as simple as getting the mic away from all the walls, use soft materials hung on flat surfaces to break up the bouncing sound waves, and you should be good to go.

If room reflections (standing waves) remain an issue, you might try and switch from an Omni directional mic to a more directional model for that room, and stay closer on the mic rather than further away, just use a good pop filter and it should work fine.

You may also simply cut some bass boominess by using EQ, dropping freqs below 100 or 200, as long as it doesn't end up making the voice sound 'thin' as a result.  A little cut at 100Hz can go a long way in taming boominess.   You can also try getting closer to the mic and utilize some mics ability to create what is known as a 'proximinity' effect.. which DJ's use to get the full bassy sound in the voice.

 :)

Sound treatment vs. sound proofing.

Some people get these terms mixed up ...
If you want to not only 'treat' the space inside the room - but also stop sound from exiting the room (sound proofing), then you need to study various materials that will help.
You want materials that have a good STC rating (sound transmission class) with good STL (sound transmission loss) characteristics and numbers.  You want high STL numbers, ... sound goes in at say 90dB SPL (sound pressure level) and comes out the other side of the material at say 70 dB SPL, that's an STL of 20dB ....  In sound proofing, it's common practice to use several types of materials to stop unwanted sound from passing through, such as wood panels, insulation, concrete blocks, and the ultimate... LEAD LINED WALLS! lol
You can fill walls with sand too, just make sure they're sealed really really well, or the vibrations over the years will have you in a 'beach setting' before you know it! lol  :P

There's lots of remedies for sound treatment, and some are easier to execute than others.. sometimes it's best to just save up a few bucks and invest in some computer tuned materials like SONEX which I've used in many applications to 'treat' the rooms less than perfect sound characteristics.  You can get sonex acoustical foam that acts on the highs, and mids, and special sonex for BASS and room boominess!  I still have a few panels of sonex from the old studio days ...  You don't need to cover the entire surface, as just a few panels strategically placed can do a great job of taming a room's acoustics. 

If you're planning on building a 'recording space' or studio, from scratch, the most important thing to consider is the exact dimensions of the finished room(s).  The size - length width and height all make the room what it will sound like, .... get one dimension off by a few inches or centimeters, and you can screw the whole design up... get it right, and you can have an awesome sounding room that is balanced and needs no 'room EQ' from the monitor amps.  You want a flat frequency response across the range from low to high.    This is why 'rectangle' or square rooms don't often translate well as a studio... often one or two, or all walls will be built 'splayed' so that no opposing wall is parallel to each other. 
The key is to prevent the standing waves from building up in the first place.

 :)
« Last Edit: August 29, 2015, 02:40:55 PM by Glenn »
Old Eastern saying "Man who run in front of car, - get tired .... man who run behind car, get exhausted"
I like to ride IN cars, it's less tiring and less exhausting :)

Offline way2lon

  • The Crew
  • Commited Poster
  • *****
  • Posts: 505
  • Karma: 12
  • You are not punished for anger but by it.
Re: The 'sleeping bag' audio booth
« Reply #2 on: August 29, 2015, 03:08:54 PM »
Man! Glenn. You wrote a book. (A damn good read though). I was only having some fun with my new mic. It's one of those cheap Chinese electret condenser mics. Only cost 13 from Ebay with free postage from China. I really like it but it did seem to boom a little. Had my grandaughters up this afternoon and got them to do a vocal in the 'booth'....Now it's their house/den.
REAL STUPIDITY BEATS ARTIFICIAL INTELLIGENCE EVERY TIME

Offline Glenn

  • Alpha Wolf (when she's not around...lol)
  • The Crew
  • Commited Poster
  • *****
  • Posts: 2323
  • Karma: 21
  • Music and Nature's Harmony
    • gmhCafe
Re: The 'sleeping bag' audio booth
« Reply #3 on: August 29, 2015, 03:36:53 PM »
lot's of fun there Dave.

glad you enjoyed the book... lol ...
I suppose I should migrate that to a topic thread on it's own ... I don't 'plan' while writing a response, it just sorta comes out, all at once..... blahhhh.... lmao   

sometimes, all some people want is a short answer, and not the book,....
I recall when Joe, musician fishin said,... would you tell a man who asked for the time, how to build a watch? lol

I enjoyed watching the kids in your new booth.
Old Eastern saying "Man who run in front of car, - get tired .... man who run behind car, get exhausted"
I like to ride IN cars, it's less tiring and less exhausting :)