In many modern buildings hard materials are used such as concrete, metal, glass, etc. The reflection of sound waves through these materials is often considered to be unpleasant. An excess of noise has a negative impact on our mental health: fatigue, irritation, stress, etc. For an office environment this results in a drop in productivity, for catering businesses less satisfied customers and less return.

In practice, sound absorption often still happens via acoustic walls, but then you lose the initial look and feel of the building. In order not to affect the architecture of the building, you can use the Rosa. The Rosa combines lighting with sound absorption. The shape of the Rosa can be compared to a petal and is available with a spot or without. The Rosa can also be perfectly combined with the Planet Air 700 , which then forms the heart of the Rosa Rosa as it were.


What exactly is sound absorption?

Sound and reverberation

Sound consists of vibrations that propagate in the air. When a sound wave comes into contact with a material, the movement of the air particles is converted into heat (kinetic energy). Material that bends, for example, absorbs the vibrations. The sound disappears in the material, as it were. Materials that cannot convert sound energy into heat reflect sound and cause reverberation in the room.


Sound absorption

Sound absorption determines the amount of sound that is absorbed within one room. If your room consists of hard materials, you can use sound-absorbing materials to shorten the reverberation time within the room, improve speech clarity and avoid background noises.

The sound absorption coefficient of a material reflects the capacity of the material to absorb the energy of a sound wave. This varies from zero to one. The higher the number, the more sound the material absorbs (or lets through). An open window has an absorption coefficient of 1, which means that all sounds are let through. Acoustic materials absorb sound. A material with a zero coefficient completely reflects the sound. Glass and steel have a value of less than 0.05.

Be careful! Sound absorption is not the same as sound insulation. With sound absorption, it concerns one room, with sound insulation it concerns noise nuisance from one room to another.



Rosa and sound absorption

Depending on the purpose of the room, a reverberation time of 0.5 to 0.8 seconds is recommended in offices. Glass and concrete produce a reverberation time of 1 second. In rooms with a lot of glass or concrete, you can therefore add absorbent materials. To achieve these standards, the Rosa is made of Basotect, a foam made of melamine resin. This foam has the property that it traps sound waves. Reverberation decreases and speech intelligibility improves over a short distance. Basotect has an absorption coefficient of 0.9. Sound is therefore almost completely absorbed.


"With the Rosa as eye-catcher you give a twist to a smooth architectural story."


Rosa and light

If you want to combine the Rosa with light, you can use the Rosa Spot. The Rosa with a spot that is available:

• in 400 lm, 600 lm, 800 lm or 1,000 lm
• with a 20° or 40° reflector
• in light colours 927 or 930. Light colour 930 is recommended for office areas.
• With or without a dimming option (Dali, 1-10V, TE-LE).

Download the product leaflet of the Rosa 700.

Downloadthe product leaflet of the Rosa Spot 700