When greenery absorbs: stabilised moss, lichen and noise correction
Stabilised moss and lichen: a measured coefficient, not a marketing effect
"Add some plants, they absorb noise": the promise gets passed around, and it is largely false. A potted plant does nothing to change the reverberation of an open space. What absorbs sound are precise assemblies, stabilised moss or lichen mounted on an absorbent backing, whose coefficient can be measured rather than assumed.Kytom draws this distinction honestly: acoustic greenery is a useful complement to a correction plan, never a substitute for it. Where reverberation is the main issue, it is our acoustic correction expertise that addresses the subject; greenery adds a measured contribution and a visual benefit.
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What really absorbs
Not all plant surfaces are equal when it comes to noise. Sparse foliage in a pot makes a negligible contribution. A panel of stabilised moss or lichen mounted on an absorbent substrate, on the other hand, behaves like a porous absorber: its alpha-w absorption coefficient commonly ranges between 0.3 and 0.7 depending on thickness, density and assembly, a performance that can be verified in testing rather than merely announced. The rule is therefore simple: it is the surface, the thickness and the backing that create absorption, not the presence of green in itself. We favour assemblies whose performance is documented, and we size them according to the absorbent surface actually needed for the floor plate.
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The right balance
Greenery as a complement to an acoustic plan, never as its replacement
Correcting the acoustics of a floor plate means targeting a reverberation time and distributing the absorbent surface where it counts, on the ceiling first, then on the walls and partitions. A moss wall fits into this calculation as one absorbent surface among others, with the added advantage of also being an image feature. But it replaces neither an absorbent ceiling nor a full open space treatment. When reverberation is the real subject, we start from our acoustic correction expertise, the acoustic diagnosis and the measured reverberation time, and greenery comes in to complete the setup where it brings a double value, acoustic and visual.
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Use cases
Open spaces, booths and creativity rooms
The absorbent living wall finds its place where noise needs to be treated without displaying a technical device: the backdrop of an open space, the wall of a videoconferencing booth, a creativity room where atmosphere matters as much as performance. In these contexts, it combines reduced reverberation with a signal of care. For challenges involving sound isolation between rooms or high reverberation, it remains a supplement, and dedicated acoustic treatment takes the lead.
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Frequently asked questions
Do plants really reduce noise?
A potted plant, no, its contribution is negligible. A panel of stabilised moss or lichen on an absorbent backing, yes, measurably so. The difference comes down to the assembly, the thickness and the surface, not the fact that it is greenery. We rely on performance verified through testing.
What absorption coefficient can be expected from a moss wall?
Depending on thickness, density and backing, the alpha-w commonly ranges between 0.3 and 0.7. It is an honest absorber, to be sized according to the absorbent surface needed for the floor plate, and not a complete acoustic treatment on its own.
Can an acoustic ceiling be replaced by a living wall?
No. The ceiling remains the most effective absorbent surface because it is the largest and the most exposed to the sound field. The living wall completes the setup and brings image value, but it does not replace a properly sized acoustic correction plan.
