Soundproofing Calculator
Calculate the complete bill of materials for decoupled wall framing, resilient drop ceilings, and acoustic floating floors. Computes gypsum fiberboard, acoustic drywall, cavity mineral wool batts, steel channels, resilient isolation clips, perimeter tape, acoustical sealant, and fasteners.
Acoustic System Configurator
Select partition type and enter dimensions for a complete material specification
1. Assembly Preset
2. Dimensions & Openings
~1.9 m² / door deducted
~1.8 m² / window deducted
3. Cost Estimation (Optional)
Bill of Materials (BOM)
Detailed purchasing list based on tested acoustic assemblies
- Never allow drywall or screed to directly touch perimeter walls without isolation tape.
- Seal all perimeter joints with non-hardening acoustical caulk (never standard silicone or foam).
Engineering Acoustics Rules
Soundproofing efficiency is governed by the mass-air-mass principle and strict airtightness. Superficial treatments do not alter transmission loss.
Key Soundproofing Principles
- Mechanical Decoupling: Breaking structural contact prevents vibration transfer.
- Mass + Cavity: Heavier outer sheets and deeper insulation damp low-frequency bass.
- Airtight Sealing: Sound travels wherever air can leak. Seal every joint with acoustic caulk.
Tested Standards Reference
- North America: ASTM E90 (STC airborne) & ASTM E492 (IIC impact).
- International: ISO 717-1 (Rw) & ISO 717-2 (Lnw normalized impact).
Next steps after soundproofing calculation
Once acoustic materials are specified, plan for the flooring base and wall finish coatings.
Why professionals rely on this acoustics calculator
- Walls, ceilings, and floating floors. Custom engineering logic for independent stud partitions, clip-decoupled ceilings, and wet/dry floating floors.
- Complete Bill of Materials (BOM). Generates actual sheet counts, insulation packs, linear profile lengths, isolation clips, caulk tubes, and screws.
- Tested building assemblies. Designed around standardized USG, Knauf, GA-600, ASTM E90/E492, and ISO 717 laboratory benchmarks.
- Openings & waste allowances. Deducts doors and windows while maintaining configurable 5–10% cutting reserve for sheets and batt insulation.
How to calculate acoustic materials
- Select surface type: Walls, Ceiling, or Floating Floor.
- Choose assembly system: Independent Studs, Resilient Clips, or Direct Sandwich Panels.
- Enter surface dimensions: length and height/width in meters (or feet).
- Subtract doors and windows on the partition wall.
- Choose number of sheathing layers (1 layer, 2 layers staggered, or 3 layers with viscoelastic MLV damping).
- Review the categorized bill of materials and estimated total project cost.
Pro Tip: For maximum airborne speech isolation on party walls, use an independent 2" (50 mm) steel stud with 1/2" GVL + 1/2" acoustic drywall and perimeter acoustic caulk.
Common soundproofing calculation mistakes
Ignoring flanking noise paths. Sound easily bypasses an STC 55 partition wall via hollow drop ceilings, shared back-to-back electrical boxes, ductwork, and undercut doors.
Rigid mechanical coupling. Driving standard screws through resilient channels into framing behind completely destroys the decoupling effect.
Skipping acoustic perimeter caulking. Sound travels wherever air can leak. Unsealed perimeter gaps can degrade an assembly's sound isolation performance by 5 to 10 points.
What to verify before purchasing materials
Choose non-hardening acoustical sealant. Standard painter's caulk shrinks and cracks over time. Acoustic caulk stays permanently flexible through building movement.
Verify cavity insulation density (2.0–4.0 lbs/cu ft / 30–60 kg/m³). Avoid ultra-dense insulation boards (>90 kg/m³) in wall cavities as they can transmit structural vibration.
Combine high-mass sheets. Combining 5/8" Type X drywall with gypsum fiberboard or viscoelastic damping compounds yields superior low-frequency isolation.
Soundproofing calculation FAQs
Why does the calculator recommend two different board materials?
Combining different materials (high-mass gypsum fiberboard ~1200 kg/m³ with acoustic drywall) broadens the transmission loss curve and shifts the coincidence frequency drop outside speech bands.
How many sound isolation clips do I need per square meter/foot?
Standard ceiling and wall clip layouts (such as RSIC-1 or GenieClip) use a 24" x 48" (600 x 1200 mm) grid, resulting in approximately 2.8 to 3.2 isolation clips per square meter (approx. 0.3 clips per sq ft).
Why is perimeter isolation tape required under all tracks?
Perimeter tape breaks mechanical contact between steel channels and the building frame, preventing structure-borne vibrations from flanking into the new acoustic partition.
Can I use standard painter's caulk instead of acoustical sealant?
No. Standard painter's caulk cures brittle and cracks during seasonal movement. Acoustical caulk remains permanently elastic, ensuring airtight seals for decades.