Ceiling Attenuation Class
- This is a rating value for the efficiency of the ceiling as a barrier to airborne sound transmission between adjacent rooms when the dividing wall doesn't connect with the structural ceiling.
- 35 is a typical CAC for offices.
- A ceiling system with a CAC < 25 is consider low performance, whereas one with CAC > 35 is high performance.
See also: Articulation Class, Sound Transmission Class.
Subjects: Noise & Vibration