Technology comparison
Absora-sheet vs.
Porous absorbers
Why the 3rd generation of sound absorption surpasses conventional materials in every respect.
- Class A absorption
- A1 — non-combustible
- 100% recyclable
Direct comparison
Feature by feature
Feature
Absora-sheet metal absorber
Porous absorbersConventional
Sound absorption coefficient
Absora-sheet metal absorberαw up to 1.0 (Class A)
Porous absorbersαw up to 0.75 (Class C)
Low-frequency absorption (< 250 Hz)
Absora-sheet metal absorberHighly efficient — Helmholtz resonance
Porous absorbersWeak — only in thick layers
Mounting depth for full effect
Absora-sheet metal absorberFrom 25 mm
Porous absorbers100–200 mm required
Fire protection
Absora-sheet metal absorberA1 — non-combustible
Porous absorbersB2 / B1 — often critical
Recyclability
Absora-sheet metal absorber100% mono-material, recyclable
Porous absorbersComposite — usually residual waste
Fibre freedom
Absora-sheet metal absorberCompletely fibre-free
Porous absorbersFibre abrasion possible
Cleaning & hygiene
Absora-sheet metal absorberWipeable — cleanroom & food-safe
Porous absorbersSensitive to dirt & moisture
Lifespan
Absora-sheet metal absorber> 50 years dimensionally stable
Porous absorbers10–20 years — settling & fatigue
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