Sound proofing floor

@rbull11 

My first thought, is you must be playing your music way to loud for anything but maybe some bass to pass through 6”-8” of concrete or it’s traveling through the walls. However, my subwoofer used to rattle the windows and AC vents until I bought four washing machine isolation feet from Amazon for like $20 and an 18”X18” piece of floor tile to go on top of my carpeted floor.  Worked like a charm. I did something similar with my speakers. I bought some Isoacoustics Gaia isolation feet and couple pieces of 1” thick granite, also on top of the carpeted floor .  They made a huge difference! 

I installed mass loaded vinyl under the wood floor. It helped greatly to reduce the sound. I also lined the walls with it before the drywall went up. It is heavy and hard to work with but great results.

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.

@rbull11

6" to 8" of poured concrete, "cement floor". You assume the sound from your audio system is through the floor. 6" to 8" of poured concrete? You must be listeng to your audio system pretty loud. Using speaker spikes?

I would say the building is not a 3 or 4 story building. Just a guess it’s may be 10 stories. Maybe a lot taller than that. Interior walls for each story are built on the concrete floor slab. Hard to tell how the exterior wall are constructed. Depends on the construction of the exterior wall of the building. Sometimes the exterior finished walls of the interior living space of the building is metal stud with drywall. Drywall thickness??? I have no idea what building fire codes are in Florida. Floor to floor fire break code, fire stop penetrations, hour rating requirements. ??? It can depend on how old the building is. You said the building was built in 2006. Are the Condo units in the building fire sprinkled? Makes a difference on floor to floor fire stop ratings Thus possible sound transfer between floors. If you knock on the exterior wall is solid like concrete or sound like drywall. Thick drywall?

Is your audio system speakers on an exterior wall?

Vertical mechanical pipe chases?

Before you start just throwing money at the problem I would first try talking to someone in building maintenance. Not cleaning personnel. Mechanical maintenance personnel. They may have access to the building construction Blue Prints.

You didn’t say what your cooling/heating system is. Therein is it common building system.

Individual exhaust systems? Bathrooms and kitchen range hood exhaust? Each Condo space has a separate vent to the outside of the building or ties into a building central duct system?

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I'm looking into the mass loaded vinyl and a few other options. I'm on the 4th floor of a 4 story building. I'm not playing my music extremely loud ( too me ) My neighbors on either side don't hear my music, I've checked with both. It's just the neighbor below. It's not extremely loud to my neighbor but just enough to be bothersome when trying to sleep.For a temp. solution I've turned it down a little, put a pad under my sub woofer and turned my spikes over so thet're not going through the carpet to the sub floor. I've ordered spike pads so I can turn the spikes back the correct way.

Are they "hearing" the bass or midrange/treble as well? It doesn't make sense that all frequencies are passing through unless the whole floor is hitting a resonance with your music. It's pretty hard to stop the long bass wavelengths. Isolating your floor from the concrete is not practical, but would help immensely. Have you set the volume to where you like it and gone downstairs to hear it for yourself? That might help develop a solution.