Estimate room resonance frequencies from room length, width, and height. This calculator shows the lowest resonances, axial bass modes, room ratio, resonance spacing, and likely low-frequency problem areas.
Room dimensions:
The calculator uses length, width, and height to estimate the frequencies where standing waves may form.
Resonance order:
Higher orders show additional resonances above the fundamental room frequencies.
Resonance type:
Axial resonances use one dimension, tangential use two dimensions, and oblique use all three dimensions.
A room resonance calculator helps identify low-frequency areas where bass may sound boomy, weak, uneven, or slow to decay. It is useful for home theaters, studios, listening rooms, music rooms, podcast rooms, and speaker setup planning.
This calculator estimates rectangular-room resonances. Real results can change with furniture, doors, openings, wall construction, acoustic treatment, speaker placement, and listening position.
The room resonance formula for rectangular rooms is:
f = c ÷ 2 × √((n/L)² + (m/W)² + (p/H)²)
Room resonance is a frequency where sound energy builds up because the room dimensions support standing waves.
Bass wavelengths are long, so they interact strongly with room length, width, and height. This can cause peaks, dips, and ringing.
They are closely related. Room modes are the calculated resonant patterns of a room, while room resonance often describes the audible buildup or ringing caused by those modes.
Use bass traps, adjust speaker placement, move the listening position, avoid sitting against walls, and consider multiple subwoofers or equalization after placement is optimized.