HSA3 vs. Porous absorbers
Why the 3rd generation of sound absorption surpasses conventional materials in every respect.
Merkmal
HSA3 Metall-Absorber
Porous absorbers
Sound absorption coefficient
αw to 1.0 (Class A)
αw to 0.75 (Class C)
Low-frequency absorption (< 250 Hz)
Highly efficient due to Helmholtz resonance
Weak - only effective in thick layers
Mounting height for full effect
from 25 mm
100–200 mm required
Fire Protection
A1 (non-combustible)
B2 / B1 (often critical)
Recyclability
100% Monomaterial - mono-material recyclable
Composite material – usually residual waste
Fiber freedom
Completely lint-free
Fiber abrasion possible (mineral wool, fiberglass)
Cleaning & Hygiene
Wipeable, suitable for cleanroom & food
Sensitive to dirt and moisture
Lifespan
> 50 years of dimensional stability
10–20 years, settlement & material fatigue