Explore the acoustic properties of your room.
Room acoustic analysis is the first and most critical step in designing a studio, listening room, or home theater. Without accurate data on how sound behaves in a specific space, any treatment is a shot in the dark. Our calculators provide a complete acoustic picture right in your browser — from standing wave calculation to a comprehensive eight-metric report.
Every room has a set of resonant frequencies (modes) determined by its dimensions. Axial modes — between two parallel surfaces — have the greatest impact: peaks up to +10 dB and dips down to −20 dB in the low-frequency range below 300 Hz. Tangential and oblique modes further shape the picture. Uneven mode distribution leads to boomy, unclear bass and unreliable monitoring.
Reverberation time (RT60) measures how quickly sound decays: for a recording studio, the recommended range is 0.3 – 0.4 s; for a mixing room, 0.2 – 0.3 s; for a home theater, 0.4 – 0.6 s. Speaker-boundary interference (SBIR) and flutter echo between parallel walls add artifacts that must be identified before acoustic treatment begins.
The Bonello and Bolt criteria help evaluate room proportions at the planning stage: if dimensions can be adjusted, these tools show which length-width-height ratios yield the most uniform mode distribution. For existing rooms, analysis results become the foundation for absorber design and monitor placement.
8 analysis tools
Comprehensive acoustic analysis: volume, surface area, dimension ratios, and overall assessment.
Calculate axial, tangential, and oblique modes. Visualize standing waves and problem frequencies.
Calculate reverberation time using Sabine and Eyring formulas. Compare with recommended values.
Predict frequency dips and peaks caused by reflections from walls, floor, and ceiling near speakers.
Detect flutter echo between parallel surfaces. Calculate repetition rate and delay time.
Evaluate mode distribution uniformity across third-octave bands — Bonello chart.
Check if room proportions fall within the Bolt area for optimal modal distribution.
One report: modes, RT60, SBIR, flutter echo, Bonello, and Bolt — all metrics in one place.
1. New room or renovation.Start with "Bolt Area" and "Bonello Criterion" to verify that room proportions allow acceptable mode distribution. If dimensions can be changed, adjust them before construction.
2. Existing room.Run "Room Analyzer" or "Room Profile" for a unified report with all key metrics. Pay attention to problematic mode frequencies, reverberation time, and SBIR zones.
3. Specific issue.If a particular note booms in the room, use "Room Modes." Hearing ringing between walls? Check "Flutter Echo." Bass is muddy near a wall? Open "SBIR."
4. After analysis, move to the Treatment section for absorber design and to Equipment for optimal monitor placement.