Nobody sits in the whole room.
A statistical figure gives you one average for a whole auditorium. Echo Pro's ray-tracing engine gives you the seat — which one has the problem, which single late reflection is causing it, and what treating it actually recovers.
What's below is a saved example: Pro's engine run on an example room, with the 3D scene drawn to show the geometry. It is not a reading of anyone's real room, and it does not show the finished engine live. Ordering opens soon, once our professional indemnity insurance is in place.
Every path sound actually takes.
A 20 × 15 × 8 m auditorium, geometry drawn out below: dozens of traced reflections, a handful followed in full so you can watch one arrive at the seat it hits.
Nobody sits in the average of the room.
A figure for every seat.
Speech clarity mapped across the room, seat by seat.
The reflection behind it, named.
See which surface is causing a poor seat and what treating it would change.
A real 3D ray trace.
Orbit the room and watch sound travel through it.
Listen from any seat.
An audible illustration of the modelled room, not a recording.
Two versions, seat by seat.
Compare today with the treated room across the whole audience.
A dossier for the file.
A report with the limits of the method stated alongside the results.
Ordering opens soon, once our professional indemnity insurance is in place.
Drag to look around, or leave it: it turns on its own. Click a seat or a reflection path for its real numbers — C50, echo index and DRR for a seat; which wall and how much clarity treating it would recover for a reflection. Every path is a genuine specular reflection, from one real solve of this room.
Why you'd need this over the statistical method
The seat, not the room
The statistical method gives you one number for the whole space — right for most rooms, and not enough for an auditorium. Pro answers per seat: this row, that aisle, the one under the balcony overhang.
The reflection, named
Not “the room rings for 1.9 seconds” — which wall, how late, how much clarity fixing it actually recovers. A trace instead of a guess, so the fix is one surface, not a hope.
Built for geometry that breaks the average
Raked seating, balconies, domes, anything where the shape of the room is doing the acoustic work. That's precisely where a statistical average stops being honest, and where a traced path still is.
From the trace to the paperwork
A real Speech Transmission Index for every seat, built from that seat's own traced reflections — mapped on the plan beside C50, so the rows that lose the words show up at a glance.
Put headphones on, pick a seat, and hear it: the direct sound and every reflection arriving from its real direction, then the same seat with the room taken away.
Compare a room before and after a change, seat by seat, to see what a design move actually does where people sit — not just to the average.
Method, absorption data, per-band results, a row for every seat and an honest uncertainty section, in one print-ready document to attach to a submission.
An annotated seat map to carry round the venue, and every seat position as a DXF file the install team can open in their own CAD package.
Rate a measured octave-band spectrum — from a sound level meter or an equipment data sheet — against the NC and NR curves.
Try the NC/NR tool →The same account layer as Studio, ray-traced
A figure per seat only helps if you can keep it. Every project below is real and working today, built on the ray-trace engine above rather than a separate, lesser Pro — you'll need an active Pro account to open one, which is what subscribing below gets you.
Save rooms into a project — an auditorium's every performance space, a campus's every lecture theatre — and see every one of them at a glance. Every saved room across the account rolls up into a single view of what's meeting target and what isn't.
Open your projects →Add a colleague to any project by email and they work from the same saved rooms alongside you — not a screenshot forwarded back and forth. Managed from inside the project itself.
Open your projects →Every time a saved room changes, the version it replaces is kept, not overwritten. Open a room's history to see the geometry before a redesign against after, and restore any past version in one click.
Open your projects →Every room type Pro understands, with the published target it's checked against and the exact standard it comes from, plus a live gauge on every saved room showing where it sits against that target.
Browse the targets →- Clarity seat by seat, not one number per room
- Finds the one late reflection that ruins a row
- Ray-traced detail where statistical is not enough
- Listen from any seat on headphones
- Design-submission dossier, seat maps and CAD export
- Projects, saved rooms and revision history — the same as Studio
Subscribe above, or try one room first for . Ordering opens soon, once our professional indemnity insurance is in place. Questions first? echo@acoustaplot.com — a person reads it.