TL;DR: C-ATS panels were independently tested by BSRIA to BS EN ISO 354 (the reverberation-room method), Report 100241/1. The Reverberation panel is a broadband absorber reaching toward full absorption across the mids and highs; the Resonance panel is corner-loaded for low frequencies; the Reflection panel is a low-absorption, clean reflector when bonded. The measured octave-band figures are below.
How to read these tables
Values are sound absorption coefficients (αs) per octave band unless noted: 0 = reflective, 1.0 = fully absorptive. (Reverberation-room figures can exceed 1.0 — an edge-diffraction characteristic of the method, not an error.) Resonance is reported as equivalent absorption area per panel (m²), because it is used discretely in corners. New to this? See how to read an absorption table.
Reverberation Control Panel (REV-CP-50)
A broadband absorber — the room's main reverberation tool. Plane-absorber coefficients (αs):
| Hz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| αs | 0.25 | 0.51 | 0.88 | 1.09 | 1.07 | 1.18 |
Reflection Control Panel (REF-CP)
Tuned as a clean reflector, with absorption depending on how it's fixed (see mounting):
| Hz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| αs — bonded (default) | 0.01 | 0.08 | 0.28 | 0.11 | 0.01 | 0.06 |
| αs — screw-only | 0.01 | 0.20 | 0.54 | 0.12 | 0.04 | 0.09 |
Resonance Control Panel (RES-CP)
Corner-loaded low-frequency control — strongest where it matters, in the bass. Equivalent absorption area per panel (m²), corner placement:
| Hz | 125 | 250 | 500 | 1000 | 2000 | 4000 |
|---|---|---|---|---|---|---|
| Aobj (m²/panel) | 0.38 | 0.35 | 0.32 | 0.25 | 0.15 | 0.14 |
Test details
- Standard: BS EN ISO 354:2003 (reverberation-room method), BSRIA, Report 100241/1.
- Mounting matters: how a panel is fixed changes its absorption — see the bonded vs screw-only figures above.
- Not covered by this report: the Marine Reflection Control Panel and the Isolation System (isolation is a sound-insulation, not absorption, measurement).
FAQ
Are C-ATS panels independently tested?
Yes — by BSRIA to BS EN ISO 354 (Report 100241/1).
Why does the Reverberation panel read above 1.0?
That's a normal characteristic of the reverberation-room test method (edge diffraction), not an error.
Why is the Resonance panel shown in m² rather than a coefficient?
Because it's used discretely in corners, so equivalent absorption area per panel is the meaningful figure.
Is there data for the Marine panel?
Not in this report — marine and isolation products are assessed separately.