Calculate standing wave resonances in rectangular rooms

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What are Room Modes?

Room modes are resonant frequencies where sound waves "pile up" between parallel surfaces, creating loud and quiet spots at specific frequencies. They're most problematic at low frequencies (bass) where wavelengths are long enough to fit between walls.

Why it matters: Modes cause uneven bass response — some notes boom, others disappear. Knowing your room modes helps you position speakers/listeners and choose bass trap locations. Aim for evenly distributed modes without clustering.

Room Dimensions
L:W 1.33
L:H 2.22
W:H 1.67
Tip: Ideal room ratios avoid integer multiples. Common recommendations: 1.0 : 1.4 : 1.9 or 1.0 : 1.28 : 1.54 (Bolt Area).
Analysis
Schroeder Frequency
85 Hz
Below this, room modes dominate. Above, diffuse field behavior.
Axial (strongest)
Tangential
Oblique (weakest)
Found 0 modes below 300 Hz
Frequency Distribution (20-300 Hz)
Relative Strength
20 Hz 50 100 150 200 250 300 Hz
Mode List
Frequency Mode (n,m,p) Type Wavelength

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