Protection against basses
I'm guessing this subreddit is mostly about soundproofing the musician's environment. In my case, I'd like to get protection from my neighbor's music and basses. I suffer from hyperacusis and sounds in general put me in a state of extreme anxiety - and when I say "anxiety", I'm saying this as someone who just spent 9 months in a mental hospital and whose whole nervous system got so haywire by sound related severe anxiety disorder that I now suffer from countless health issues - hyperthermia, hypertension, increased heart rate, chronic fatigue, burning sensations all over my body, etc. -. Long story short, when I say I need to protect myself somehow, I'm not exaggerating.
I know that aside from basically building a bunker, there's no perfect protection from basses. I asked Claude whether it could "think" of a solution, and the following schema is what it came up with, and I was wondering whether someone with enough knowledge about these things would be able to tell me if its design makes sense and would be helpful (because I really don't know anything about these, and honestly I wouldn't barely able to tell if Claude was to totally improvise and gave me a Mac'n'cheese recipe).
Schema:
| / | Rockwool | air gap | Rockwool | drywall | green glue damp | MLV (mass-loaded vinyl) | green glue damp | drywall |
|---|---|---|---|---|---|---|---|---|
| metric | 6cm | 8cm | 10cm | 13cm | 13cm | |||
| imperial | 2½ in | 3 in | 4 in | ½ in | ½ in |
Key design choices
- Double-stud frame: two independent frames, never touching. This is the single biggest factor for bass blocking.
- Outer frame (neighbor side): 2×3 studs with 60 mm rockwool. No drywall on this frame — it's a pure absorber.
- Air gap of ~8 cm between frames: acts as the "spring" in the mass-spring-mass system. Deeper gap = lower resonant frequency = better bass blocking.
- Inner frame (your side): 2×4 studs with 100 mm rockwool, sitting on rubber isolation pads.
- Cladding sandwich on inner frame only: drywall → Green Glue → MLV → Green Glue → drywall. Two constrained-layer damping zones plus added limp mass.
- Only the inner frame sits on rubber pads — the outer frame can sit directly on the floor since it carries no significant mass.
- No contact between the wall and ceiling, floor edges, or side walls: leave 1-2 cm gaps everywhere and seal with acoustic sealant. Any rigid contact = vibration bridge = lost performance.
- All seams sealed: MLV seams overlap and tape, drywall seams sealed with acoustic sealant. Bass exploits every air gap.
- Total depth: ~28-29 cm from existing wall.
| Frequency range | Reduction |
|---|---|
| Low bass (40-80 Hz) | 15-22 dB |
| Mid bass (80-160 Hz) | 20-28 dB |
| Mid frequencies (250-1000 Hz) | 35-45 dB |
| High frequencies (2000+ Hz) | 45-55 dB |
In practical terms: a 20 dB reduction makes sound feel ~4× quieter to human perception. Neighbor bass that currently feels intrusive and inescapable should drop to "distant background presence you can sleep through." It won't be silent — physics doesn't allow that for a partial wall — but it should be transformative.
Caveat: these estimates assume bass is transmitting through the wall. If it's also coming through floor/ceiling (very common with subwoofers coupling to building structure), the wall alone will only address part of the problem. Worth testing by pressing your ear to different surfaces during a bass event before committing.
Thanks in advance to anyone who cared enough to read all this - even if you could not answer -.
Cheers.