Sound Transmission Class (STC) is a single-number rating that measures how well a building element attenuates airborne sound. Higher STC values mean less sound passes through -- an STC of 50 renders loud speech barely audible, while 60+ provides studio-grade isolation.
Click any bar to reveal its cross-section detail.
Doors are the weakest acoustic link in any isolation chain. Every door in the complex is rated and sealed with acoustic gaskets.
Control Room to VO Live triple-pane construction with 5-degree tilt to prevent standing waves.
| Layer | Spec |
|---|
All isolation elements sorted by STC rating, with construction details and pass/warn/fail indicators.
| Element | Type | STC | Thickness | Key Materials | Notes |
|---|
Mass-Air-Mass Principle: Two massive layers separated by an air gap transmit far less sound than a single layer of equivalent total mass. The air gap decouples the panels so vibrations cannot conduct directly between them. This is why the concrete walls with RSIC clips and air gap achieve STC 65.
Green Glue (Viscoelastic Damping): Applied between two layers of gypsum, Green Glue converts sound energy into heat via shear deformation of its polymer matrix. It is most effective between 100--5000 Hz, providing an additional 5--9 STC points versus gypsum alone. The Buffer Spine gains STC 55 partly through this mechanism.
RSIC Clips (Resilient Sound Isolation): These rubber-isolated mounting clips break the structural (rigid) connection between the wall and the furring channel. By eliminating the direct conduction path, flanking transmission drops significantly. RSIC-1 clips on the north wall and RSIC-V clips on the diagonal provide the final isolation push to achieve STC 65.