🎙️ B304

VO Live

Professional voiceover booth engineered for NC-20 silence. Motorized acoustic curtain provides adjustable RT60 between dead (0.20s) and live (0.27s) settings.

Floor Area

5.31 m²

Volume

14.6 m³

NC Target

NC-20

RT60 @ 1kHz

0.2s

Dimensions & Geometry

Room Dimensions

Width	3.01 m avg (301 cm avg)
Depth	1.76 m
Height	2.75 m (acoustic ceiling)
Area	5.31 m²
Volume	14.6 m³ (5.31 × 2.75)
Flooring	vinyl

Boundaries

north	concrete north
west	concrete diagonal
east	buffer spine
south	partition to Control

Door

Door	D3 — VO Live
Size	80 × 220 cm
STC	45
Swing	N into VO Live

Room Floor Plan

This room is highlighted on the full zone plan. All positions from SSOT → DXF.

VO Live Infrastructure

Lighting

Main	2× 200W LED panel 2700–3500K tunable

Acoustic Treatment

walls	70% coverage with 50mm rockwool panels (fabric wrapped)
ceiling	Rockfon Sonar E (NRC 0.90) — full coverage in 600x600mm T-grid at 2.75m
ceiling above	100mm Rockwool ProRox SL 930 batts on top of tiles
bassTraps	4x corner-mounted, floor-to-acoustic-ceiling (2.75m)
floor	vinyl on float floor

RT60 Analysis

Target range: 0.15s – 0.25s · Achieved @ 1kHz: 0.2s

Frequency	Target	Achieved	Diff	Status
125 Hz	0.25s	0.28s	0.03s	✅
250 Hz	0.22s	0.23s	0.01s	✅
500 Hz	0.20s	0.20s	0.00s	✅
1000 Hz	0.18s	0.19s	0.01s	✅
2000 Hz	0.18s	0.18s	0.00s	✅
4000 Hz	0.18s	0.17s	-0.01s	✅

Modal Analysis

Schroeder frequency: 234 Hz · Dimensions: 3.01 × 1.762 × 2.75 m

Mode	Length (1.762m)	Width (3.01m)	Height (2.75m)
n=1	97.4 Hz	57.0 Hz	62.4 Hz
n=2	114.0 Hz	194.7 Hz	124.7 Hz
n=3	170.9 Hz	292.0 Hz	187.1 Hz
n=4	227.9 Hz	—	249.5 Hz
n=5	284.9 Hz	—	311.8 Hz

Noise Criteria Budget

NC Target	NC-20
NC-20 target assumes VRF unit off or on minimum fan speed during recording. Realistic with HVAC running: NC-25–NC-30 pending final MEP design.
HVAC Max	NC-12
Transmitted Max	NC-12
Design Margin	5 dB

Acceptance Criteria

NC Pass	≤ 20
NC Conditional	≤ 23
RT60 Range	0.15s – 0.3s
Min STC	53

SSOT v3.1 · March 2026 · Source: DXF → ezdxf → verified