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djgizmo · 17th April 2009

Forgive me, as I know I'm going to get beaten for bringing this topic back up. I'm not trying to prove any one right or wrong, I just want to have some solid facts as I want to be able to tell my wife and children one day I built my home studio with a design purpose.

I took the time to re-read the entire thing 3x over to make sure I wasn't missing much.

I see there was a lot of name calling back and forth. I'm a nobody special here and even I know that it's one thing to disagree with someone, its another to start calling someone names.
The wife and I are buying a house and I've have the go ahead to floor my studio room anyway I choose (within budget reason). I'm willing to rip up the carpet in area (should be a 19'x11'x9' area) and stain the concrete. Once stained, I'm willing to run whatever tests that have been determined valid on the stained concrete room. Once finished, I'll start the process of laying down some kind of wood laminate flooring (which WILL include foam vapor barrier) and I'll run the exact test again. I'll post video/pictures of the entire process. I'll get myself a Nady CM100 and whatever test software that would be needed. My room would be treated with broadband absorbers to help eliminate room defect issues.
One thing I've read about, and I'm not sure it applies. Doesn't refraction play a role in acoustics at this level? Like others has pointed out, concrete/cement is usually physically colder than wood. This usually causes the air just right above the concrete to be colder, therefore slightly denser. Sound has the tendency to want to stay near denser medium. Wouldn't that affect the speed / bend of the sound which in turn would give it a different RT60. If that is true, then just measuring absorption coefficient response would not be enough as it doesn't measure the speed of the sound.
I guess since most wood flooring isn't rigidly mounted, wouldn't that cause an issue with difference of sound vs cement. Maybe causing a resonance somewhere?

Thanks for being patient with me.

17th April 2009	#270
djgizmo Lives for gear Joined: Aug 2007 Location: Tampa, FL Posts: 1,062 1 Review written	Forgive me, as I know I'm going to get beaten for bringing this topic back up. I'm not trying to prove any one right or wrong, I just want to have some solid facts as I want to be able to tell my wife and children one day I built my home studio with a design purpose. I took the time to re-read the entire thing 3x over to make sure I wasn't missing much. I see there was a lot of name calling back and forth. I'm a nobody special here and even I know that it's one thing to disagree with someone, its another to start calling someone names. The wife and I are buying a house and I've have the go ahead to floor my studio room anyway I choose (within budget reason). I'm willing to rip up the carpet in area (should be a 19'x11'x9' area) and stain the concrete. Once stained, I'm willing to run whatever tests that have been determined valid on the stained concrete room. Once finished, I'll start the process of laying down some kind of wood laminate flooring (which WILL include foam vapor barrier) and I'll run the exact test again. I'll post video/pictures of the entire process. I'll get myself a Nady CM100 and whatever test software that would be needed. My room would be treated with broadband absorbers to help eliminate room defect issues. One thing I've read about, and I'm not sure it applies. Doesn't refraction play a role in acoustics at this level? Like others has pointed out, concrete/cement is usually physically colder than wood. This usually causes the air just right above the concrete to be colder, therefore slightly denser. Sound has the tendency to want to stay near denser medium. Wouldn't that affect the speed / bend of the sound which in turn would give it a different RT60. If that is true, then just measuring absorption coefficient response would not be enough as it doesn't measure the speed of the sound. I guess since most wood flooring isn't rigidly mounted, wouldn't that cause an issue with difference of sound vs cement. Maybe causing a resonance somewhere? Thanks for being patient with me.