Professional acoustics calculators

Room modes, reverberation, sound transmission. Free, no signup.

Room Analysis
〰️ Room Modes Calculator
Find the bass frequencies where your room resonates (boomy or dead spots). Enter room dimensions to see which frequencies will be problematic and where to place bass traps.
⏱️ RT60 Calculator
Calculate how long sound lingers in your room (reverb). Too echoey? Too dead? This tells you how much acoustic treatment you need to hit your target for studios, offices, or classrooms.

Sound Isolation
🔇 STC Estimator
How well does your wall block voices, TV, and music? Enter your wall construction to see if it meets code and how to improve it. Higher STC = quieter neighbors.
👟 IIC Estimator
How well does your floor block footsteps and dropped objects? Choose your floor assembly to see if neighbors below will hear you walking. Higher IIC = less stomping noise.
🤫 Speech Privacy
Can people in the next room hear your conversations? Combines wall performance and background noise to rate privacy from "confidential" to "no privacy." For offices, clinics, and meeting rooms.
🌬️ Background Noise (NC)
Is your HVAC too loud for your space? Enter sound levels by frequency to get an NC rating and see if it meets standards for studios, offices, or classrooms. Lower NC = quieter HVAC.

Learning Resources
🩺 Diagnose Your Problem
Not sure which calculator to use? Answer a few questions about your acoustic issue — boomy bass, echo, neighbor noise, footsteps — and we'll point you to the right tool.
📖 Acoustics Guides
Learn the fundamentals of room acoustics, sound isolation, and noise control. Guides cover room modes, RT60, STC, IIC, speech privacy, and background noise.

Need help with a complex space?

Get expert recommendations for challenging acoustical environments, custom product specifications, or multi-room projects.

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