How it works
The holes' open area, the panel thickness, and the cavity depth set the resonance; a porous fill damps and widens it. Fresnelcut picks the geometry for your target band and reports the peak absorption estimate plus the backing materials to buy. It is the drilled-hole sibling of the slat absorber.
f_res = (c / 2π) · √( p / (t_eff · D) )p = hole open-area ratio, t_eff = effective hole length (with end correction), D = cavity depth.
Best for
- Low-mid resonance and boxiness
- A clean, uniform look that's simple to fabricate
Not the tool for
- High-frequency echo (use a diffuser)
- Deep bass without a large cavity