PRANCE metalwork is a leading manufacturer of metal ceiling and facade systems.
What are the sound absorption properties of perforated aluminium metal slat ceilings?
Perforated aluminium metal slat ceilings blend linear aesthetics with robust acoustic performance. Slats featuring precision-punched holes—ranging from 1 mm to 3 mm in diameter—permit sound waves to penetrate into absorptive media above, such as mineral wool or non-woven polyester. The key acoustic parameter, the sound absorption coefficient (αw), depends on hole ratio (typically 15–25%), slot geometry, and backing depth. Well-engineered systems achieve αw values of 0.6–0.8 in the critical speech band (500–2000 Hz), reducing reverberation and ambient noise.
Installation involves layering a perforated slat ceiling over a resilient acoustic pad; decoupling the slat from the backing with a resilient gasket further enhances low-frequency absorption. The exact panel thickness, cavity depth, and acoustic backing density are calibrated during product selection to meet project-specific NRC (Noise Reduction Coefficient) targets.
In addition to noise control, perforated slats maintain free airflow for HVAC integration, and their uniform pattern masks plenum clutter. For design flexibility, manufacturers can vary hole layouts—from staggered to straight rows—without compromising performance. The result is a ceiling that seamlessly merges linear form with function, delivering comfortable, acoustically tuned spaces for offices, auditoria, and public concourses.