Work out studio room modes instantly with clear inputs, formula shown and shareable results.
The first axial mode in each dimension is the speed of sound divided by twice that dimension, and the Schroeder frequency, 2000 times the square root of RT60 over volume, marks where modal behaviour gives way to diffuse. Below the Schroeder frequency the room, not the speakers, dominates what you hear, which is why bass treatment matters far more than anything above it.
Axial mode
f = speed of sound / (2 x room dimension), taking 343 m/s
Schroeder frequency
f = 2000 x sqrt(RT60 / room volume)
f = speed of sound / (2 x room dimension), taking 343 m/s. The first axial mode in each dimension is the speed of sound divided by twice that dimension, and the Schroeder frequency, 2000 times the square root of RT60 over volume, marks where modal behaviour gives way to diffuse.
Below the Schroeder frequency the room, not the speakers, dominates what you hear, which is why bass treatment matters far more than anything above it.
Enter room length, room width, room height, reverberation time. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.