Building a Sound Booth

We were asked to build a vocal/sound booth or room for the worship leaders at Saddleback Church in Lake Forest, California. Its purpose was primarily to block outside noise but we also wanted to deaden the sound inside the room. This is intended to be the place were they do their voice overs for music videos.
The overall size of the room was about 7'6" square so we decided to build it in our shop and then transport it to their recording studio.
Materials used in the construction included:
1/2 MDF for sheeting and battens
2" styrofoam insulation
1 " dense foam insulation
1/2 doug fir acx plywood for sheeting and battens
1 x 4 pine for framing
2" encapsulated rigid fiberglass insulation for interior sounding
2" aluminum angle for corner connections.
liquid nails adhesive for insulation
lots of screws and nails
laminated glass plate for the window
A similar room from a company that makes them such as "Whisper Room"
would cost about $15,000. We did it for much less. Your cost will largely depend on the size of the room and how many little extras you want to throw in like doors, windows and ventilation.

[@andrewwhitehouse1878]

This was excellent 😊 also noticed the Telefunken 251 in the shots there 🎉

[@marcelfrancisco2675]

As one that built his own Voice Over booth, pretty much the same as you. The only thing I would recommend to contain the resinense of the space is, either, Tranangular, or, ripple foam with, top, and side bass block fome.

[@BobsTwoCarGarage]

Yes,we added a few more acoustical elements including foam triangles

[@emyhR]

Thank you for this! I would of never thought of slapping together the walls with the boards like you did but not only is it practical and easier but adds a nice touch when painted like that

[@BobsTwoCarGarage]

Thanks glad I could give you done ideas.

[@theaustindude]

What are the acoustic properties of that 2" foam? Would it have been better to use some type of fluffy fiberglass for at least one of those layers?

[@KhrisMooreMusic]

Great job Bob!

[@BobsTwoCarGarage]

Thanks.

[@RyanpcHartnett]

Hey Bob, I'm interested in getting something similar built out here in Southern CA. What's the best way to get in contact with you?

[@dinkyshopYT]

Wouldn’t you want an air gap to dampen vibration between the two rigid foam pieces?? Like soft foam damper furring strips seems like it wd have improved the STC. Has anyone used Homasote in lieu plywood or drywall as a sheathing? I wd think the Homasote has better sound dampening and is fire resistant. Insulated glass w/ good STC acoustical insulation properties) ratings also has an air gap (or is argon gas filled) vs being laminated together. I think you can buy insulated glazing but it shd have soft gaskets or setting caulk to prevent rattling /vibrations in the frame.

[@BobsTwoCarGarage]

Good ideas

[@mrcrowleyoz]

How much did you spend in materials?

[@BobsTwoCarGarage]

I have no idea