6x6 Mobile Room Construction with high STC

[kittonian]

We need to design a room that can be built and taken apart without a huge amount of hassle that will block up to 110db of sound yet remain a perfect acoustical space inside. It would need to be a complete enclosure (ceiling, floor, walls) with some sort of ventilation and lighting system. I have taken a look at things like Whisper Room, VocalBooth.com, etc. and nothing comes close to this kind of design at the level of sound we are talking about.

The room will be used for vocal recording, and we will place guitar/bass amps in here so that they can be mic'd and recorded properly.

Does anyone have a blueprint for such a design already? If not, any and all suggestions are welcome.

[knightfly]

Joshua, there's a good reason you've not found anything; what you ask is neither possible nor necessary with any material known to man.

You need to understand that this would take thicker walls than your entire space, especially at the lower frequency bands.

The reason this isn't even necessary is that, if you do a google on Fletcher-Munson and look at the equal loudness curves you'll find, you see that at 50 hZ the human ear neads around 52 dB of SPL just to hear the sound AT ALL. This is why all you need at low end is around 55 dB TL, going up to maybe 75-80 dB at mids and highs, for total inaudibility. Even this is difficult with PERMANENT construction, much less portable.

I've been toying with some designs for just what you actually NEED (not what you asked for, I'm not God) but haven't had enough time to get very far yet - part of the problem is the "takedown" requirement.

I'm trying to get a new shop in before bad weather hits this year, and once that's in place I'm planning on this as one of the first projects; once it's complete, I intend to sell complete plans and pix of step-by-step construction. However, if you need this sooner than a year or two, it's probably (realistically) not going to come from me...