Do Soundproofing Panels Work for Noisy Neighbors?

Soundproofing panels don't work for noisy neighbors when they're the usual foam, fiberglass or fabric absorbers: a 2 in. panel weighs 0.5 lb/sq ft and adds almost nothing to an insulated 2x4 wall, rated STC 34 in USG lab tests (opens in a new tab), when loud speech stays audible until STC 50 (Johns Manville (opens in a new tab)). Do soundproofing panels work for noisy neighbours at all? Only the heavy barrier types that get sealed into the wall.

The fix depends on what kind of noise you're hearing:

• Voices and TV: seal first (door sweep, outlet gaskets, sealant along the base of the wall), then add mass and decoupling. Don't skip the sealing. One unsealed 1/8 in. gap 1 ft long drops a wall from STC 46 to 36 in PABCO's guide (opens in a new tab), and resilient channel took USG's wall from 34 to 48.
• Bass and music: this takes a heavy, decoupled wall. STC is calculated from 125 Hz up (Acoustical Society of America (opens in a new tab)), so a wall's rating won't tell you how it does with the deepest notes.
• Footsteps upstairs: that's impact noise, and it travels through the floor framing. The fix goes on the upstairs floor or into a decoupled ceiling. Panels on your wall won't touch it.

A heads-up for renters: sealing and door sweeps come off when you move out, but decoupling means rebuilding the wall, and that needs the landlord.

Acoustic panels vs soundproofing explains why absorbers don't block, do soundproof panels work gives the verdict on every panel type, and the soundproof panels guide covers the barrier products. There are more answers in the soundproof panels FAQ.