TL;DR: How a panel is fixed changes how it performs. Bonding a panel (adhesive) damps its own resonance, so it behaves as a clean, predictable reflector with lower absorption. Leaving it screw-fixed only lets the panel resonate, adding a resonant absorption peak — higher absorption, less predictable. Choose the method to match the acoustic job.
Why mounting matters acoustically
A panel is not just its face material — it's a small vibrating system. Bond it firmly and you stop it flexing; let it float on a few fixings and it can resonate. That difference shows up directly in the measured absorption.
Bonded vs screw-fixed
C-ATS sees this clearly in its own lab data. The Reflection Control Panel was measured both ways:
| Install | Behaviour | α at 500 Hz |
|---|---|---|
| Bonded (adhesive) — default | Damped; clean reflector, lower absorption | ~0.28 |
| Screw-only (free to resonate) | Resonant peak; higher absorption | ~0.54 |
For reflection control you usually want the bonded behaviour — a predictable reflector — which is why it's the recommended default. (Background: how to read an absorption table.)
Practical notes
- C-ATS panels use moulded countersunk fixing points; the Reverberation panel adds a peel-and-stick backing.
- The right method is part of the specification, not an afterthought — it changes the result.
- Always confirm the current install guidance for the specific panel.
FAQ
Does gluing a panel change its absorption?
Yes — bonding damps the panel's resonance, lowering absorption and making it a cleaner reflector. Screw-only mounting lets it resonate and absorb more.
Which mounting should I use?
Match it to the job: bonded for predictable reflection control; the manufacturer's recommended method for each panel otherwise.
Where does this data come from?
C-ATS panels were measured by BSRIA to BS EN ISO 354 in both states — see the absorption data.