Sound proofing floor

I've done a little soundproofing over the years, largely to isolate the noise from an air compressor used for my tonearm. I used a product I bought from Acoustical Solutions in the Virginia area, a mass loaded vinyl/melamine sheet, sold in bulk, which is very effective. Not sure you would use that, but those folks do know soundproofing and sell the products- worth a call.  I suspect you'll wind up needing a suspended floor, similar to what recording studios use but your needs may be even greater if you are dealing with neighbors who are hearing your music.

And the transmission of sound may be more than the floor- air systems, lighting conduits, any small opening or aperture is a potential leak. I found this with a small duplex sized cable pass-through, which I solved with melamine (Magic Eraser, originally meant as a soundproofing material). Doors are also "leaky" --you are down to the level of smaller than a "tiny bug" that can pass through. And, though I'm no expert, I suspect the walls, unless also concrete, will also act as membranes. 

Often, people will hire an acoustician/specialist to do design and sourcing, which will add to the expense. Not an inexpensive proposition even if you source the materials without a consultant. You might give the folks mentioned above a call--they are professional, and can give you a rough idea of what this may entail. 

I've known a few people over the years who leased or owned another space for their hobbies to keep them separate from their living quarters. 

Be interested to see what you learn simply for my own knowledge. 

Good luck,

It is a cement floor with an 8lb carpet pad and carpet. At 6 to 8 inches of cement, I live in Florida and the complex was built in 2006. I have no other noise issues, just through the floor.

A 6" to 8" concrete floor is a very unusually thick amount of concrete! However, if that is correct, your sound may find its way down through the walls instead. I find it hard to believe it would go through 8" of concrete. The only sound that would are the very low frequencies through vibrations, but that's it. You need to find out what frequencies they can hear.

6 to 8" slab unusual?!

I would try cork under the carpet padding. 

I'm not a soundproofing expert but was a home improvement contractor for 45 years. I had a job once remodeling a funeral home that had offices on the second floor. I hired a professional to soundproof the second floor thinking he was only going to do the ceiling of the first floor. Well the mechanic said he would have to come down the walls of the first floor about 2 ft. as well otherwise the soundproofing wouldn't work. As others have mentioned above, the sound does transfer from the floor through the walls below.