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Schroeder Frequency (f_s)

The crossover frequency separating low-frequency room modes from high-frequency specular sound.

By roomtreatment.diy editorial team ·

The Schroeder frequency (f_s ≈ 2000 √(RT60 / V)) defines the transition point in room acoustics. Below f_s, sound behaves modally as discrete standing waves; above f_s, sound behaves as specular rays.

The formula

fs≈2000RT60Vf_s \approx 2000 \sqrt{\frac{RT_{60}}{V}}

How it works

Understanding the Schroeder frequency allows room designers to apply pressure-based bass traps below f_s and porous absorbers or diffusers above f_s.

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References

  1. Schroeder, M. R. (1954). Die statistischen Parameter der Frequenzkurven von Großen Räumen

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