Hardware
Become part of 500+ users
Measure reverberation time — simple, fast, precise.
With AcousticCheck the reverberation time of a room is measured easily, quickly and with high accuracy — even by people without an acoustics background.
Features
What you get.
Six things that matter, done well, in a single iPhone app.
01
T20 and T30 reverberation
Reverberation time measured by Schroeder backward integration. Both T20 and T30 reported with R² fit quality per band.
02
Sweep + impulse methods
Choose a sine-sweep with a Bluetooth speaker for tougher acoustic environments, or a clap-style impulse for fast, casual checks.
03
Octave bands, third-octave in CSV
Reverberation time is displayed per octave band from 125 Hz to 4 kHz. The CSV export carries finer third-octave detail from 100 Hz to 5 kHz for your own analysis.
04
PDF + CSV export
A clean PDF for the project file, and a CSV with every band, every fit parameter, and the raw decay curve for further analysis.
05
Internal mic supported
The internal iPhone microphone is calibrated for the supported devices. Tap to measure — no external gear required for most rooms.
06
Project history
Group measurements by project and room. Compare two measurements side-by-side, before and after treatment.
14 days of Plus, free of charge.
Try the sweep method, the full octave-band results, and the PDF + CSV export with no card on file. Leave your email and we’ll send the download link — the trial starts in the app.
How it works
From download to result in under five minutes.
See how a professional reverberation measurement actually runs — from the first tap to a report you can send.
- Guided interface, no acoustics background needed
- Accurate results in under five minutes
- Your phone and a speaker as the measurement kit
- Several ways to save and send the results
- 1
Download
Get AcousticCheck from the App Store. Plus has a 14-day free trial — no card required.
- 2
Set up
Name the project and the room. Optionally connect a Bluetooth speaker for the sweep method.
- 3
Measure
Tap to record. The impulse method finishes in moments; a sweep takes a little longer.
- 4
Export
PDF for the client, CSV for your spreadsheet. Both honor the project name and the date stamp.
Pricing
Our pricing plans.
Free for casual use. Plus for working acousticians. Enterprise for teams.
Free
€0forever
Fast, simple reverberation measurement, with email support.
- Sweep and impulse measurement
- Average reverberation time
- Email support
- Guided measurement with instructions
- Multiple measurements per run
Most popular
Plus
€16.58per month, billed yearly
Save 40%. 14-day free trial.
- Everything in Free
- Reverberation time in octave bands (125 Hz – 4 kHz)
- Third-octave detail (100 Hz – 5 kHz) in the CSV export
- Save and send results — attach photos and room data
- Extensive personal support by phone and email
Enterprise
On request
For organisations needing tailored features or training.
- Everything in Plus
- Additional features tailored to your organisation
- Remote measurement for your clients
- Training for your team
For professionals
Built with consultants, architects, and AV teams.
500+
Users measuring rooms with AcousticCheck
< 5 min
From download to first result
€0
Free tier — no card required
125–4k Hz
Octave-band resolution per measurement
Acoustic consultants
Measurements your clients can read.
Sweep and impulse methods, octave-band results in the app, and a CSV export that carries the third-octave detail into your own analysis.
Architects & planners
Bring numbers to the acoustics conversation.
Measure the room as built, attach photos and room data, and send a result your client and your acoustician can both read.
AV & live-event
A spec sheet that survives the install.
Measure the empty room, the rigged room, and the room on the day. Save each run with its photos and room data so the file matches the space.
FAQ
The honest answers.
On a calibrated iPhone, T20 and T30 are typically within ±5% of a Class-2 instrument in rooms with reverberation times between 0.3 and 3 seconds. The Schroeder method is robust to ambient noise above roughly 35 dB SPL background. Each measurement reports the R² of the decay fit per band so you can see when conditions weren’t cooperating.
For laboratory-grade certification work, you still want a Class-1 instrument. For day-to-day acoustic measurement in studios, classrooms, offices, and small venues — AcousticCheck is good enough that we use it for our own consulting.
Almost none. The default workflow — place phone, tap to record, get a number — works for anyone. The more you know about acoustics, the more value you’ll get from the octave-band breakdown and the CSV detail, but the headline numbers are read-out, not interpretation.
Pros: it’s with you always. It’s ten times faster than rigging a real meter for a quick check. The PDF goes straight to the client.
Cons: it’s an iPhone. In a 4,000-seat hall with a 3-second tail and lots of ambient HVAC, you’ll want better gear. The internal mic is calibrated, but it’s still an internal mic.
Yes, currently iOS only. Android is harder because the hardware variance is much wider — we’d rather not ship a measurement tool we can’t calibrate. It’s on the long-term roadmap.
No. For most rooms the internal iPhone mic is enough. For very large or very dead rooms, or when measuring at sub-100-Hz, an external mic — connected by Lightning/USB-C adapter or Bluetooth — gives you a cleaner signal. Plus supports common XLR interfaces.
Anything from a 2-square-meter vocal booth to a 5,000-seat concert hall, within the limits above. Outdoor measurement isn’t supported (no enclosed sound field).
Blog
Hardware, expertise, news.
Long-form pieces from working acousticians, hardware tests, and the occasional release note. Filter by topic or read the latest.
Stay in the loop.
A short note from us when a product ships, opens a beta, or publishes something worth reading. No marketing fluff.