Cardboard isolation box - diyAudio
Go Back   Home > Forums > Design & Build > Construction Tips

Construction Tips Construction techniques and tips

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th February 2013, 08:31 AM   #1
diyAudio Member
 
Join Date: Feb 2013
Default Cardboard isolation box

Hi everybody,

So I want to make this isolation box, but don't fancy spending a lot or doing any carpenting. Hence I was wondering: why not simply use a cardboard box? Very strong in 2 layers and in 3 layers it's air freight proof, I'd like to see you diy THAT.
The kicker of course is, will it sound allright, padded with sound isolation, naturally. Clearly, the construction isn't stiff, is that a problem, in the case of cardboard?
How to mount the speaker? I'm into no-tech solutions, so I was thinking of a frame consisting of some wooden bars that will simply keep the speaker upright, resting on sound proof foam.

It's an idiot's approach, but that doesn't mean it won't work. What do you say?

Thanks/regards
- Guitarski
www.rocking.mobi
__________________
(\__/)
(='.'=)
  Reply With Quote
Old 26th February 2013, 12:30 PM   #2
diyAudio Member
 
Join Date: Feb 2013
Or does a speaker need to be fixed in position in order to displace air like it should?
At high volume I'd say it does. Then I'd need it to attach to something heavy.

Thanks/regards
- Guitarski
www.rocking.mobi
__________________
(\__/)
(='.'=)
  Reply With Quote
Old 26th February 2013, 09:17 PM   #3
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
I am not getting the goal here. Something to stick you head into? Double-wall box will be acoustically transparent below a few hundred Hz. Above some frequency, it will reflect completely. Sound is carried by the air, sorry to be obvious, so that means isolation needs to be air tight.

"Padded with sound isolation". You are talking two different things here. Barrier and absorber. Let me suggest yo go hit some of the sound control products web sites and read up from the real engineers.

I am not sure, but I think what yo are looking for are noise cancellation headphones. Experiences.
  Reply With Quote
Old 26th February 2013, 10:09 PM   #4
diyAudio Member
 
Join Date: Feb 2013
Noise cancellation, I think I have that on my MP3 player. If you listen closely, you notice some of it and with some luck it gets you dizzy (what a rush). To be honest I don't how it can significantly suppress the sound of a high gain amp.
You make it sound like I'm the inventor of the isolation box. Thanks, but I'm just trying to invent the low budget - no carpenting iso box.
I like your suggestion that I was implying that double layered cardboard will reduce volume. LOL! I like it! We should have a beer together. I'm not a real engineer, though :-(

Thanks/regards
- Guitarski
www.rocking.mobi
__________________
(\__/)
(='.'=)
  Reply With Quote
Old 27th February 2013, 02:06 AM   #5
diyAudio Member
 
PlasticIsGood's Avatar
 
Join Date: Mar 2012
Location: Bradford
You need mass and/or stiffness, and cardboard has little of either. However, you could use the cardboard box to define the space and enclose the mountings, and cover the box with heavy blankets when you use it.

I would guess the result will have its own sound, as the cardboard will reflect some frequencies, pass some others, resonate with several, and invent a few of its own.

Stiffness and/or mass of the speaker mounting will have an appreciable effect on the sound too.

Experiments with cardboard are cheap, and a better way of learning than asking here, probably.

Wikipedia was a good laugh: http://en.wikipedia.org/wiki/Isolation_cabinet_(guitar)
  Reply With Quote
Old 27th February 2013, 10:17 AM   #6
diyAudio Member
 
Join Date: Feb 2013
I will certainly post the results here, but I would like to conduct an informed experiment. Isolation is (sort of) cheap, but not if you buy the wrong kind. So please bear with me a little longer, before I embark on my grand experiment.
On the net I find two approaches to isolation material:
1. That sound absorbtion is in the size of the pores of the foam.
2. It's mass that matters. Then any foam would consist of flakes rather than a uniform distribution of pores. Other materials than plastic foam are possible as long as it's heavy.

Does any of this ring a bell with anyone? I will certainly contact the shops that sell it for the same question.

Thanks/regards
- Guitarski
www.rocking.mobi
__________________
(\__/)
(='.'=)
  Reply With Quote
Old 27th February 2013, 11:16 AM   #7
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Go to some automotive parts shop, better a body shop
and get some of two layers made of tar foil + low quality felt (waste )
or just tar foils ( about 2-3 mm thick).
Those would form the constrained layer damping formed together with
the ( thick and dimensionally built to sustain the forces that happen in a box)
cardboard and the fancy cover ( I used PCV foils).
The knock test would give you the measure of it all
  Reply With Quote
Old 27th February 2013, 08:39 PM   #8
diyAudio Member
 
Join Date: Feb 2013
That's excellent info, many thanks.
So you pioneered the cardboard part? How did you mount the speaker? I realized it needs a stable, rigid platform, so I reckon I will need to use a regular 1x12 cabinet anyway.

Thanks/regards
- Guitarski
www.rocking.mobi
__________________
(\__/)
(='.'=)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
High voltage isolation from set-top-box ? bordins Solid State 3 11th December 2005 08:00 AM
PS/Amp isolation in 1 box ? jimbo1968 Chip Amps 5 20th May 2005 07:04 PM
cardboard can be cool Deagle50ae Multi-Way 14 7th March 2005 06:43 PM
chocolate box cardboard coil formers :) Duo Multi-Way 4 4th January 2004 07:05 PM


New To Site? Need Help?

All times are GMT. The time now is 08:59 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2