Krossen - Sound absorber - Garnet
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Krossen

Ref: SKAB005-32C

A sound absorber with a versatile design, 15 x 15cm tiles (thickness of 60mm).

Packs of 32 or 60 units. Ideal for back walls or ceilings.

ZHFR acoustic foam in charcoal, garnet or purple, self-extinguishing, E-d0 (EN 13501-1).

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€56.00
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ACOUSTIC ANALYSIS FORM
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What are they?

KROSSEN is a set of tiles that form a versatile acoustic absorber panel; their small format, in individual tiles, allows many different patterns to be created with high sound absorption that brings a new dimension of aesthetic and functional possibilities.

They are made with our special ZHFR acoustic foam, with an improved porosity coefficient to obtain the best acoustic performance in the market. Their design also brings an improvement in the reflected sound energy distribution effect (diffusion effect) throughout the room.

... inspiration

Autumn comes to the city, the landscape is tinged with ochre hues, the leaves of the plane trees fall, covering Las Ramblas with a brittle brown carpet... a traditional image that evokes the profiles of this unique tile.

What is the application used for?

An optimised soundproof treatment for the surfaces furthest from the listener point (back wall and ceiling), mounted according to a random pattern. They soften the reverberation curve and eliminate echo, helping to improve the diffusion of reflected sound energy.

A sound absorption treatment for: control rooms, recording rooms, rehearsal rooms, radio/TV broadcasting studios, home cinema...

What is their format?

  • Pieces of: 150mm x 150mm x thickness of 60mm
  • Colours: Charcoal, Garnet or Purple
  • Packages of:
    • 32 units. - area coverage = 1.2m x 0.6m (0.72 m2)
    • 60 units. - area coverage = 1.5m x 0.9m (1.35 m2)
  • Normal packaging:
    • 62cm x 62cm x 9cm (0.03m3 / 1 Kg.)
    • 62cm x 62cm x 17cm (0.07m3 / 2 Kg.)

How much do I need?

The following table gives a guide of the estimated reverberation time depending on the size of the room and the number of pieces installed.

Reverberation time using Krossen
 
    correct   acceptable**   excess / low
RT60 at 1kHz
[seconds]		Room without treat. *SKAB005-32
32 uts. pieza		SKAB005-60
60 uts. pieza
1.2 x 1.2 x 2.2m 0.76 0.40 0.28
1.5 x 1.8 x 2.2m 1.03 0.62 0.43
2.0 x 2.0 x 2.2m 1.23 0.80 0.61

* The results are obtained by estimation in a standard room with the following finishes: plaster walls and plaster ceiling, parquet floor, one window and a wooden door.

** The 'acceptable' result is suitable for rooms that contain additional furniture (curtains, carpets, bookcases, chairs with fabric upholstery, sofas...)

Physical properties

Technical Drawing
Description: Broadband acoustic absorber
Material: ZHFR acoustic foam
Composite: Flexible open-cell polyurethane
Colour: charcoal, garnet or purple
Density: 28 Kg/m3 (ISO 845)
Porosity: 3.5 L/min (ISO 4638)
Resilience: 40 % (ISO 8307)
Fire Rating:
  • Self-extinguishing (UNE 53127)
  • E-d0 (UNE-EN 13501-1)
 Technical Drawing panel krossen

Sound absorption

Absorption coefficients in octave bands (ISO 354):

125 Hz250 Hz500 Hz1 kHz2 kHz4 kHz
0.16 0.34 0.66 0.90 0.90 0.97

* absorption coefficients in third octave are available in the data sheet.

Global coefficients:

NRC 0.70 [ASTM C423]
SAA 0.70 [ASTM C423-09a]
α mid 0.82 [DB-HR]
α w 0.65(MH)
Class C [ISO 11654]

DOWNLOADS:

Data sheet [.PDF]3D Model [.SKP]