Simplified analysis of axial room modes
Enter room dimensions.
The program will automaticly calculate resonanses and detect isolated and degenerate modes.
Use the dot as a separating char.
Speed of sound
Room proportions (H:L:W)
Lower boundary of audible range F1
Boundary of sound pressure zone F2
Schroeder's frequency F3
Boundary of reflection zone F4
Upper boundary of audible range F5
1. If several axial modes coincide (spacings between modal frequencies are equal to zero), they are called degenerate modes. This often causes a distinct peak in the amplitude-frequency response curve. Problematic frequencies will be marked in red.
2. If two axial modes are separated 20 Hz and more from each other, they are called isolated modes. In this case there will be a distinct dip in the amplitude-frequency response curve between these two modes. Problematic spacings will be marked in orange.
3. Peak and dips in the amplitude-frequency response curve cause unwanted voice and music coloration. This especially refers to the range 95-175 Hz (marked in light-grey).
4. There are essentially no speech or music colorations above 300 Hz.
Axial room modes, Hz
Arranged in ascending order, Hz
Axial mode spacing, Hz
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Developed by Andrey Smirnov