Critical listening environment with stereo nearfield monitors + sub. Trapezoidal geometry reduces flutter echo. 72% listening position for optimal stereo imaging.
| Width | 2.41 m avg (241 cm avg) |
| Depth | 2.25 m |
| Height | 2.75 m (acoustic ceiling) |
| Area | 5.47 m² |
| Volume | 15.04 m³ (5.47 × 2.75) |
| Flooring | carpet |
| North | VO Live/Control partition (Wall 5, STC 52) — D3 door + W1 observation window |
| South | Buffer spine wall (Wall 2, STC 48) — D2 door near east end |
| East | External concrete wall (east façade) |
| West | External concrete wall (west façade, diagonal) |
| Door | D2 — Control |
| Size | 90 × 220 cm |
| STC | 45 |
| Swing | W into Control Room (XScale=-1 in DXF) |
This room is highlighted on the full zone plan. All positions from SSOT → DXF.
| Main | 2× 40W LED panel 2700–3500K tunable |
| Tally | Desk switch controls TALLY-01 (above D3) and TALLY-02 (above D4) |
| frontWall | 50mm absorption behind monitors |
| sideWalls | 2× 1200×600mm RWA45 50mm panels, east + west walls at first reflection points (~120cm AFF) |
| rearWall | QRD diffuser array (80x80cm panels) |
| ceiling | Rockfon Sonar E (NRC 0.90) — 60% cloud coverage in T-grid at 2.75m |
| ceiling above | 100mm Rockwool ProRox SL 930 batts on top of tiles |
| bassTraps | 4x corner-mounted |
| floor | carpet on float floor |
Note: 2 side-wall panels chosen to address first reflection / stereo imaging without overdamping. RT60 remains ~0.23s — appropriate for broadcast monitoring.
Target range: 0.3s – 0.4s · Achieved @ 1kHz: 0.3s
| Frequency | Target | Achieved | Diff | Status |
|---|---|---|---|---|
| 125 Hz | 0.40s | 0.42s | 0.02s | ✅ |
| 250 Hz | 0.38s | 0.38s | 0.00s | ✅ |
| 500 Hz | 0.35s | 0.34s | -0.01s | ✅ |
| 1000 Hz | 0.33s | 0.32s | -0.01s | ✅ |
| 2000 Hz | 0.33s | 0.31s | -0.02s | ✅ |
| 4000 Hz | 0.33s | 0.30s | -0.03s | ✅ |
Schroeder frequency: 283 Hz · Dimensions: 2.41 × 2.252 × 2.75 m
| Mode | Length (2.41m) | Width (2.252m) | Height (2.75m) |
|---|---|---|---|
| n=1 | 76.2 Hz | 71.2 Hz | 62.4 Hz |
| n=2 | 141.2 Hz | 152.3 Hz | 124.7 Hz |
| n=3 | 211.7 Hz | 228.5 Hz | 187.1 Hz |
| n=4 | 282.3 Hz | — | 249.5 Hz |
| n=5 | — | — | 311.8 Hz |
| NC Target | NC-25 |
| HVAC Max | NC-18 |
| Transmitted Max | NC-18 |
| Design Margin | 4 dB |
| NC Pass | ≤ 25 |
| NC Conditional | ≤ 28 |
| RT60 Range | 0.25s – 0.45s |
| Min STC | 50 |
SSOT v3.2 · March 2026 · Source: DXF → ezdxf → verified