Yes, essentially. I can detail that better if you decide to build them.Build a muffler? Like a drywall box filled with insulation?
for a job well done....yesDo the walls need to be attached to the cement floor?
Most people would not have half the class you display with a humble reply like that. Clearly you are a man who takes the high road. I tip my hat to you, sir.Rrog, I owe you an apology. Called my old drummer (who doubled up as our recording man/sound sound technician!) and he confirmed what you said. The egg boxes were more about the echo/reverb. Apparently they help to some extent with sound-proofing but not a lot. He went right into one about why we recorded one track in a church as is was the reverb that we needed.
Independent lab data shows that standard fiberglass works as well. This lab data is available online. Insulation improves things, but not as much as you'd expect. Stick to fiberglass since it's cheaper. Use kraft-paper faced R13.A product that is used in commercial sound proofing is rock wool. Roxsul is the brand name and is mfg. by saint gobain. It comes in batts just like other insulation. It is used to dampen the noises made by hvac units traveling through the ducts. It also is used around bathroom walls for the same purpose. I figure that if you are going to frame and drywall, that would definitely be a plus with your build.
That's a medium density insulation. Note the frequencies affected are 2000 and 4000Hz. Standard drywall at $9 a sheet will do a heck of a lot more.A quick google came up with this.
http://www.gowallpaper.co.uk/category/Wallrock_Range/Wallrock_Thermal_Liner,b.html
Would you happen to have a few photos of these fan housings? I think I understand how you built them but I'm a visual learner and not that great with construction. Thanks for posting a great idea. Peace.One thing I did was build a housing for all of my inline fans, which are the loudest. I took 2 x 4's and built a box to fit each one, enclosed the sides with drywall, placed the fan in it, made the connections, then stuffed the entire box around the fans with insulation. I then closed it up, and used expanded foam to seal in the ducting. You can barely hear them run. There is little you can do for the Ac and the standing fans, but this will at least quiet the big loud ones. You can still hear my rooms run, but it isn't as loud as it should be LOL.
Jimmy Page recorded the first Zeppelin in small rooms with an added single mic waaaaaaay outside. The Turk taught him that and he used it in ever recording - a distant dynamic mic. Added some latency and texture. Add some bounce I guess. It worked for Page & Company.Rrog, I owe you an apology. Called my old drummer (who doubled up as our recording man/sound sound technician!) and he confirmed what you said. The egg boxes were more about the echo/reverb. Apparently they help to some extent with sound-proofing but not a lot. He went right into one about why we recorded one track in a church as is was the reverb that we needed.