What the Room Acoustic Simulator does
Enter a room size, place speakers and subwoofers on a to-scale top-down plan, set each one’s aim and mount height, and see a broadband SPL heatmap with per-speaker coverage footprints and a plain-language coverage verdict. It carries 525 professional speaker models across 32 brands, 412 of them checked against a source naming that exact model.
How the estimate is calculated
Each speaker’s maximum SPL at one metre is attenuated by the inverse-square law over the 3D distance to each floor point at ear height, reduced by an off-axis roll-off derived from the coverage angle, then energy-summed across all placed speakers. This is a free-field estimate: it does not model room reflections, reverberation time, room modes, air absorption or per-frequency behaviour.
How this differs from EASE Focus
Engineering-grade acoustic simulation (EASE Focus 3 / AFMG) uses measured per-frequency directivity data (GLL files) and models reflections and air absorption. This tool is a fast first-pass coverage estimate; for a final design, use EASE Focus 3 or send the brief.
Room Acoustic Simulator — SPL heatmap and coverage footprints
Free-field broadband estimate — not a measured acoustic simulation. Reflections, room modes and per-frequency behaviour are not modelled. For engineering-grade results use EASE Focus 3 or send the brief.
Verification status: Conditional engineering model — assumptions stated · Independently reference-tested · reviewed 2026-08-30
· Engineering notes
How to read this tool’s output
Stage 3 (design). Use to sketch speaker placement, aim, mount height and quantity intuitively before BOQ. For engineering-grade per-frequency results with reflections and air absorption, move to EASE Focus 3 / AFMG (K-array and JBL publish GLL data) or send the brief.
What an engineer should know
The assumptions behind the numbers this tool produces.
- Top-down room canvas that energy-sums each placed speaker's free-field Max SPL (inverse-square distance plus an off-axis roll-off from coverage angle) into a broadband SPL heatmap, per-speaker coverage footprints and a plain-language coverage verdict across the K-array, KGEAR, JBL, Bose, QSC, Yamaha and Sonance catalogue. It is a tentative coverage estimate, not a measured acoustic simulation — no reflections, room modes, reverberation time, air absorption or per-frequency behaviour.
When this tool is the right one
The project moments and room types this is built for.
- First-pass speaker placement and aim study at design stage.
- House-of-worship coverage sketch before EASE Focus.
- Restaurant / retail BGM zoning and quantity intuition.
- Auditorium coverage-gap and hot-spot screening.
What changes the answer in practice
Field conditions that move the result away from the planning figure.
- Free-field broadband estimate is conservative in treated rooms and optimistic-on-uniformity in lively rooms.
- Off-axis roll-off here is a simplified single-number model, not measured polar directivity — use it for placement intuition, not final tuning.
Defensible starting architectures
Vendor-neutral reference points, not a recommendation to buy — the right answer is the one that survives your site survey.
- Premium worship / auditorium: K-array Kobra / Python, JBL CBT or KGEAR GF columns — controlled vertical dispersion line sources.
- Distributed BGM (restaurant / retail): ceiling 100V line, evenly spaced for low uniformity spread.
- Live event: high-output line array with sub support, footprints overlapped for even floor coverage.
Common mistakes
Failure patterns we see on real projects.
- Treating the broadband free-field heatmap as a measured prediction — it omits reflections and room modes that dominate lively rooms.
- Specifying 100V / BGM cabinets for live amplified SPL targets.
- Aiming all boxes the same way in a long narrow room, leaving cold seats at the back.
- Ignoring mount height — ear-plane SPL falls off fast when a box is flown too high for a short throw.
What this tool does not do
Deliberate limits — where the estimate stops and design begins.
- Does not model reflections, reverberation time, room modes, air absorption or per-frequency behaviour.
- Hands off to EASE Focus 3 or the brief wizard for engineering-grade results.
Where this tool fits
The building types this output is calibrated for — and, where we have said so, the ones it is not.
· What the estimate is good for
Place four ceiling speakers in a 6 × 8 m open-plan office and the heatmap shows whether the corners fall more than 6 dB below the centre — the classic early sign you need a denser grid or wider-coverage models before the ceiling is even drawn. It is a first-pass coverage check, not a measured acoustic design.
· Frequently asked
Room Acoustic Simulator —
what people ask first.
Is this a real acoustic simulation?
No — it is an indicative free-field broadband estimate. It models inverse-square attenuation and off-axis roll-off in both planes — the horizontal fan against each model's horizontal dispersion and the elevation angle from the mount height to the ear plane against its vertical dispersion — energy-summed across the speakers you place. It does not model room reflections, reverberation time, room modes, air absorption or per-frequency behaviour. For a measured, engineering-grade design, use EASE Focus 3 (AFMG) with GLL directivity data, or send us the brief.
What do the SPL numbers mean?
They are an indicative coverage read: the minimum, average and maximum SPL across the floor at ear height, how uniform that coverage is, and how much of the floor sits on your target level. Treat them as a first-pass sanity check on speaker count and placement — not a final specification or a guaranteed measured result.
Which speakers can I place?
The full public catalogue of professional models we work with, each carrying a verified maximum-SPL and coverage-angle specification. Brand names appear as ecosystem examples to make the estimate concrete; their presence here implies no exclusivity, authorisation or partnership claim.
Can I use this to specify a system?
Use it to explore options and frame the brief. The final specification — subwoofer integration, DSP, delay alignment and per-frequency tuning — is engineered against a measured model and a site visit, then verified by commissioning measurements on site.
How accurate is the coverage verdict?
The verdict is illustrative — a plain-language read of the uniformity and on-target percentage. It is directionally useful for catching obvious gaps or overlaps early; it is not a substitute for on-site commissioning measurements such as SPL mapping or speech-intelligibility (STI) testing.
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· Begin
Take the layout to an
acoustic workshop.
Send the room and the placement you arrived at here. We re-model it against measured directivity data and your finishes, then validate it on site before anything is specified.