Mode Positions & Schroeder Frequencies
Circles = axial mode fundamentals (L, W, H). Dashed lines = Schroeder frequency (modal → statistical transition).
Per-Room Modal Analysis
| Room | Length Mode n=1 | Width Mode n=1 | Height Mode n=1 | Schroeder Freq |
|---|---|---|---|---|
| VO Live B304 | 53.8 Hz | 128.9 Hz | 62.4 Hz | 273 Hz |
| Control Room B311 | 63.5 Hz | 66.5 Hz | 62.4 Hz | 253 Hz |
| Video/Podcast B312 | 35.8 Hz | 41.5 Hz | 50.4 Hz | 130 Hz |
Height mode: VO Live and Control share H = 62.4 Hz (275cm audio-clear ceiling). Video/Podcast drops to H = 50.4 Hz because of its 340cm high ceiling.
Bolt's Optimal Ratios
Ideal room dimensions follow 1 : 1.14 : 1.39 or 1 : 1.28 : 1.54.
None of our rooms are cuboid (VO Live is trapezoidal, others have irregular boundaries), but the analysis informs treatment placement. Rooms with dimensions that produce coincident modes need targeted bass trapping at those frequencies.
Mode Coincidence Analysis
| Room | Coincidence | Impact | Treatment |
|---|---|---|---|
| VO Live | H=62.4 Hz near L=53.8 Hz | Strong reinforcement at ~58 Hz | 3 full-height corner traps + 3× 125 Hz membranes + velour curtain |
| Control | L=63.5 Hz, W=66.5 Hz, H=62.4 Hz | Three modes within ~4 Hz — significant bass buildup | 3 full traps + 1 soffit trap (NE, above D3) + ceiling cloud + 2 QRD rear diffusion |
| Video/Podcast | L=35.8 Hz, W=41.5 Hz, H=50.4 Hz — well spread | Good modal distribution; near-square plan risks flutter | 6 deep superchunk traps (400–600 mm) + 28% ceiling cloud + multi-colour curtain backdrop (N + E north-half) |