project D:Absorb

To create the desired effect in the 8 soundscapes, panels with different material properties are used.

1: Absorbing panel

Absorbing panel consists out of MAkustik MA15-s, perforated transparant panels made out of 2 layers of PET with an air cavity in between (bottles for beverages are often fabricated out of PET). These panels are able to absorb low en middle high sound frequencies.

Properties : Because of the perforations and the cavity between the PET panels the material acquires absorbing qualities. perforations > diameter perforations 0,55 mm, the perforations are placed in a matrix of 5*5 mm, transparant > light transmittance 85%, weight > 1.5 -2 kg/m2

Fabrication : the panel can be attached, by means of screws or double-sided tape, to profiles of metal or plexiglass.

Manufacturer: Sonogamm Leuven

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  Makustik

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Above a graph with absorption values is showed. Every colour shows the absorption values at different frequency bands of two PET panels with an air cavity of a certain width in between.

2. Reflective panel

The reflective panels consist out of PET material. PET material applied as a single layer and without perforations provides reflective abilities. PET i

OctaveBands/ sound absorbing coefficient PET 125/0.23 250/0.50 500/0.73 1000/0.88 2000/0.91 4000/0.97 NRC/0.76

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