Do I need to install anything?

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For Students · Room Modes

Room Modes for a bell

Built for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition. Simulate a bell live below — adjust the inputs and watch it respond, right in your browser.

Room Acoustic ModesLive

standing waves in a room

Controls

Presets

Length Lx (m)

Width Ly (m)

Height Lz (m)

A room resonates at frequencies where sound waves fit exactly between its surfaces. These modes — axial between two walls, tangential among four, oblique among all six — cause the boomy bass and dead spots in small rooms. Even spacing sounds smooth; clustered modes cause problems. Cube-shaped rooms are the worst.

▶ Run in Python

Data Inspector

Lowest mode34.3 Hz

Modes < 200 Hz67

Volume56 m³

Governing equation

f = \frac{c}{2} (\frac{n _{x}}{5})^{2} + (\frac{n _{y}}{4})^{2} + (\frac{n _{z}}{2.8})^{2}

Reading this result: The lowest mode is 34.3 Hz and 67 modes fall below 200 Hz; aim for even spacing between them to avoid boomy peaks and dead spots.

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More with Room Modes

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Frequently asked questions

Is this good for students?: Yes — this version of "Room Modes for a bell" is framed for students learning it for a class or exam. See the concept move instead of memorizing formulas — and check your homework intuition.
Do I need to install anything?: No. It runs in any modern browser, free, with no account required.