Articulation index (AI) represents how all elements in and properties of a space affect the ability to understand speech. Al is expressed as a decimal value between 0 (renders speech unintelligible) and 1.00 (Causes no interference with speech clarity). By absorbing sound within a space, reducing the amount of sound transmitted to adjacent areas and improving conversation otherwise less intelligible to non-participants, Decor System floor and ceiling panels provide a solid foundation for an effective acoustical management system.
Ceiling Attenuation Class (CAC) indicates the ability of a ceiling panel to reduce sound transmission. Measured in decibels (dB), CAC represents how much sound will be prevented from transmitting between rooms with a common ceiling plenum. For example, a ceiling panel with a CAC of 40 will reduce transmitted sound by 40 dB. A ceiling panel with a CAC of 35 or higher is considered to offer significant sound reduction properties.
dBA (A-weighted decibel) is a single number measurement based on the decibel and weighted to approximate the response of the human ear with respect to frequencies.
