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Boom Predictor

Where will your room boom?

Enter your room’s size. See which bass notes will likely boom.

Enter your room’s size.

Or start from an example room.

This is a prediction.

Furniture, walls, and where you sit move it.

Find the real one
How this works

Bass bounces between opposite walls, and between the floor and ceiling. A note whose half wavelength fits that distance, once or several times, builds up. Acousticians call these axial room modes.

The first one is 343 ÷ (2 × distance), with the distance in meters. Multiply it by 2, 3, and so on for the rest. Where several land close together, the boom is usually strongest.

It assumes a rectangular room with solid walls, and leaves out weaker booms that bounce around corners.

Questions

Why does my room boom at certain notes?
Bass bounces between your walls, floor, and ceiling. At notes that fit the distance between them, the reflections stack up, so those notes sound louder and last longer. Acousticians call them room modes.
Why only length, width, and height?
The booms between two opposite surfaces are usually the strongest, and they depend only on the distance between them. The calculator assumes a rectangular room with solid walls.
Why do square rooms boom more?
When two walls are as far apart as two others, both pairs boom at the same note, and the booms stack. The same happens, more mildly, when one side is twice as long as another.
Why doesn’t it match what I hear?
Real rooms aren’t perfect boxes. Soft walls, open doors, furniture, and where you sit all shift the boom. Boom Finder finds the one in your room.
Can it help with speaker placement?
It tells you which notes your room’s size favors. Where you sit decides how loud each one is, so use Monitor Placement for the spots and Boom Finder for the boom that’s left there.
Does this fix the boom?
No. It tells you where to listen. Unboom, the app for Mac and Windows, finds the boom in your room and turns down just that note in everything your computer plays on your speakers.
Do bass traps still help?
Yes, especially in corners. Unboom tames the boom that’s left.

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