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Articulation class (AC)

Speech privacy performance

Articulation class (AC) indicates the speech privacy performance of a ceiling in an open plan environment, such as a space divided by half height walls. A rating below 150 indicates poor speech privacy performance; a rating above 180 indicates good performance.

AC is measured and classified according to the ASTM E1111 standards.

Rockfon® Sonar™, Rockfon® Alaska™, Rockfon® Tropic™ and Rockfon® Koral™ have good AC ratings..

 
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