Find the frequency where your room transitions from discrete room modes to diffuse behavior.
Room dimensions
Schroeder Frequency
208 Hz
Volume: 46.2 m³ (1632 ft³) · RT60: 0.5s
Below 208 Hz
Modal region. Individual room modes dominate. Speaker and listener placement has the biggest impact. Bass traps and positioning are your primary tools.
Above 208 Hz
Diffuse region. Modes overlap so densely the room behaves statistically. Absorption panels, diffusers, and first reflection treatment are most effective here.
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Try the Atuund WorkstationThe Schroeder frequency (fₛ = 2000×√(T60/V)) marks the crossover between two acoustic regimes. Below it, individual room modes dominate and sound behavior is position-dependent. Above it, modes overlap so densely that the room behaves statistically — more like a diffuse field. This frequency typically falls between 100–300 Hz for home listening rooms.
Below the Schroeder frequency, placement optimization and bass traps are your primary tools — thin absorbers and diffusers don’t work at these wavelengths. Above it, conventional acoustic treatment (absorbers, diffusers) is effective. Knowing your Schroeder frequency helps you decide where to invest effort and money.
The formula is fₛ = 2000 × √(T60 / V), where T60 is the broadband reverberation time in seconds and V is the room volume in cubic meters. A 50 m³ room with an RT60 of 0.5 seconds has a Schroeder frequency of about 200 Hz.
Yes — either increase the room volume (impractical in most cases) or decrease the RT60 by adding absorption. Adding bass treatment brings down the Schroeder frequency, which means more of the spectrum behaves diffusely and is easier to treat with conventional methods.
Atuund uses finite element method (FEM) modal analysis to model room acoustics. Built for hi-fi enthusiasts, home theater builders, and anyone who wants better sound from their speakers.