Measure on the drawing
Open the drawing beside your sheet, set the scale once, then measure lengths and areas and mark up as you go. Send each measurement straight into your calcs.
The all-in-one workspace for acoustic design
Build each job from modular calculation blocks that show every step of their working. Share templates, chart styles and data across the team, and keep the whole job in one file, in one desktop app.
For Windows and macOS · Works offline · Your data stays on your computer
- Efficient
- One window and one file for the whole job, not five programs.
- Modular
- Calculation blocks that chain together and recalculate as you go.
- Traceable
- Every input and every step of the working, on show.
- Collaborative
- Templates, chart styles and data shared across the team.
From the drawing to the result, in one window
The drawing, the map, the sheet and the plot sit side by side, so the work moves between them without switching software.
Measure on the map
Mark up receptors and barriers on the site map and measure the distances between them, with no trip out to a mapping tool and back.
Timbral is excellent. It allows me to run my calculations under one roof, and makes my life easier!
No black box
Each calculation drops in as its own block of inputs, workings and result. Follow every step, change any input, and watch it recalculate.
Verified against hand-calculated references, with over 600 acoustics tests behind the calculations.
Works offline
Timbral runs on your own machine. There is no cloud calculation and nothing is sent to a server, so it works on site, on a train, and under an NDA.
A spreadsheet copy on every save
Workings and results are written to spreadsheets on every save, inside your project file. Rename the .tmb to .zip and they are there, even if you stop subscribing.
Project.zip └─ exports/ ├─ workspace.xlsx └─ csv/ └─ one .csv per sheet
Move beyond Excel
Powerful tools for the next generation of acoustic engineers.
Global variables
Name a noise source or a sound reduction index once and use it anywhere. Your inputs live in one place and are shared across every sheet.
Instant plots, scaled to your data
Chart a spectrum down the bands or across the rows. The axes scale themselves, so your time goes on the result, not the formatting, and the chart copies straight into the report.
In-built data processing
Tidy and transform survey data where it sits, without a detour through another spreadsheet.
Set it up once, share it with the team
Everyone starts from the same foundation, ensuring quality and brand alignment.
Shareable templates
Save a finished sheet, or a set of sheets, as a template, with its calculations, formatting and linked plots. Point the whole team at a shared templates folder, or send a colleague a single template file.
Plotting defaults
Set the house chart style once: fonts, axis titles, gridlines, line styles and series colours. Export it to a file and colleagues import it, so every new chart looks like the practice made it.
Fully searchable data library
Turn a shared spreadsheet of data into a flexible library, filterable by any parameter. It updates whenever the spreadsheet does, so the whole practice can keep it current.
67 calculations and counting
Each one drops into the sheet as a movable block: inputs you can edit, workings you can follow, hide or move between sheets.
New calculations and features arrive in regular updates, included for as long as you subscribe.
Methods drawn from published standards and guidance
- ISO 9613-2
- ISO 717-1
- ISO 11654
- ISO 2631-1
- ISO 16283-1
- IEC 61672-1
- BS 8233
- NS 8178
- CIBSE Guide B4
- ASHRAE
- Fundamentals
- Speed of sound · Wavelength · Time correction · Number of sources
- Propagation
- Point, line and plane sources · Near, mid and far field · Conformal and parallelepiped areas
- Environmental
- ISO 9613-2 barrier attenuation
- Mechanical services
- Fan sound power, CIBSE Guide B4 · Duct attenuation, bends and junctions · Duct breakout, break-in and ceiling plenums · Crosstalk, ERL, louvre directivity
- Building acoustics
- Room to room and facade break-in, BS 8233 · Sabine and Eyring reverberation time, NS 8178 limits · Mass law, composite transmission loss · Room modes and Schroeder frequency
- Vibration
- Static deflection and resonant frequency · eVDV from acceleration · Vibration unit conversion
- Ratings
- NR · Rw, Dw and DnT,w with C and Ctr · A, B, C, D, H, R and Z weightings · G-Rating · Weighted absorption and class
How pricing will work
When Timbral launches you start with a 14-day free trial, then a monthly subscription. We haven't set prices yet.
Annual licence
12-month commitment at a lower monthly rate.
Rolling
Month to month. Stop whenever you like.
Either way, you get
- All calculations
- PDF and map measurement
- Plotting tools
- Shareable team templates and defaults
- Data processing tools
- Regular updates with new calculations and features
- Email support
Register your interest for an exclusive discount on launch.
Your spreadsheet exports stay readable if you stop.
Questions
Anything else? Just ask, or send us a note.
When can I get it?
Timbral is in development and will be released before the end of 2026. Register your interest and we'll let you know as soon as it's available.
What will it cost?
There's a 14-day free trial. After that it's a monthly subscription, or a lower rate on a 12-month commitment. Register your interest now for an exclusive discount on launch.
Which platforms does it run on?
Windows, on both Intel/AMD and ARM machines, and macOS.
Do I need to be online to use it?
No. Timbral works offline and your data stays on your computer. It checks your licence when you activate, and now and then after that, with a grace period if you're away from a connection. Your calculations, drawings and data never leave your machine.
Can I get my work out of it?
Yes, and you don't have to think about it. Calculation workings and results are exported to spreadsheets on every save, inside the saved file itself: rename the .tmb to .zip and open it. A workbook and a CSV for each sheet are there, and they stay readable even if your trial ends.
Can I trust the results?
The calculations are verified against hand-calculated references, with over 600 acoustics tests behind them, and every block shows its working so you can check the method. As with any in-house spreadsheet, it's up to you to use your own experience and professional judgment before you accept a result.
Where do the calculations come from?
Published standards and guidance, among them ISO 9613-2, ISO 717-1, ISO 11654, BS 8233, NS 8178, CIBSE Guide B4 and ASHRAE. Every block shows its working, so you can check the method and show it in your report.
Will it keep improving?
Yes. Timbral gets regular updates with new calculations and features, and every update is included for as long as you subscribe. If there is a calculation you would like to see, tell us.
Be first to try it
Timbral isn't on general release yet. Leave your details and we'll tell you when the 14-day free trial opens.
Register your interest for an exclusive discount on launch.