Fiberlux Studio — Material Calculator v0.2

Calculated estimate of the sound absorption of secondary fibre felt

Thickness: mm

A thicker panel absorbs more bass.

Density: kg/m³

Too sparse — sound passes through; too dense — it reflects.

Air gap behind panel: mm

0 = directly on the wall; 200 = suspended ceiling

Model

Miki is more reliable for dense felt and low frequencies.

Sound absorption class

αw

NRC

CO2 data: to be assessed during the EIT Spark programme

Diffuse incidence (used for class) Normal incidence (comparison)

Computational estimate based on a scientific model, not a laboratory measurement. Felt model: Delany–Bazley (1970) or Miki (1990). Airflow resistivity is calibrated on measured airlaid panels made from secondary textile fibre (Rubino et al., 2023). Class, αw and NRC are calculated for diffuse sound (Paris integral, extended reaction) following the ISO 11654 method from octave values; a reverberation-room measurement (ISO 354) can differ.