How do I simulate a bass-reflex box?

Open this page and use the live Reverb Time (Sabine) tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.

Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.

Can I use my own numbers?

Absolutely — every input is adjustable, and with data import you can drive a bass-reflex box from your own measurements.

Use case · powered by Reverb Time (Sabine)

Reverb Time (Sabine) for a bass-reflex box

Simulate a bass-reflex box live in your browser. This runs the real Reverb Time (Sabine) solver — adjust the inputs, watch it respond instantly, and export the result. No install, no account.

For:Students Researchers Educators Engineers Hobbyists & Makers K-12 Students First Responders

Reverberation Time (Sabine)Live

how long sound lingers

Controls

Presets

Room volume (m³)

Surface area (m²)

Avg absorption α

Reverberation time — how long a sound takes to decay by 60 dB — is set by Sabine's formula RT60 = 0.161·V/(S·α). Big, hard rooms ring for seconds; small, soft rooms deaden almost instantly. Concert halls target around 2 seconds; recording studios far less. Adding absorption pulls the decay down.

▶ Run in Python

Data Inspector

RT600.98 s

Absorption A33 sabins

Charactergood (living room)

Governing equation

RT_{60} = \frac{0.161 V}{A} = \frac{0.161 \times 200}{33} = 0.98 s, A = i \sum α_{i} S_{i} = 33 sabins

Reading this result: RT60 of 0.98 s is a balanced living-room decay: speech stays clear with a touch of warmth.

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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About this simulation

The full Reverb Time (Sabine) tool models a bass-reflex box with the same numerics engineers and scientists use — running entirely client-side. Change any parameter and the result updates in real time, so you can build intuition, check a design, or teach the concept without spreadsheets or installs.

More you can do with Reverb Time (Sabine)

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Frequently asked questions

How do I simulate a bass-reflex box?: Open this page and use the live Reverb Time (Sabine) tool below — set your inputs and the simulation runs instantly in your browser using real numerics. No install, no account needed.
Is it free?: Yes. The simulation runs free in your browser. A one-time unlock or a Pro plan adds advanced parameters, saved presets, data import, and clean exports.
Can I use my own numbers?: Absolutely — every input is adjustable, and with data import you can drive a bass-reflex box from your own measurements.