Interior acoustics are now a key issue in commercial buildings, high-end housing, schools, healthcare facilities, and public buildings.
Users expect quiet, comfortable environments that are conducive to concentration or rest. Architects and contractors are therefore looking for technical solutions to reduce reverberation, improve sound clarity, and limit noise pollution.
While acoustic panels and absorbent false ceilings are common, one lever is still underutilized: the role of mineral and plant-based materials applied directly to walls, particularly in the form of bio-based coatings.
Made from flax, marble powder, and lime, Absolin bio-based coating perfectly illustrates this approach: a material that combines aesthetics, acoustic performance, and sustainability.
Let's discover how these materials can transform the acoustic comfort of a space.
1. Interior acoustics: an increasingly important issue
In professional and public environments, noise pollution is one of the primary factors contributing to stress and discomfort.
The impacts of poor acoustics:
- Mental fatigue,
- Loss of concentration,
- Difficulty following a conversation,
- Tense atmosphere,
- Poor intelligibility in meeting rooms,
- Frequent complaints from users,
- Decrease in productivity.
Regulations and labels (WELL, HQE, School of the Future, hospitals) are gradually tightening their requirements, forcing projects to incorporate acoustics from the design stage onwards.
2. Why mineral and plant-based materials are acoustically effective
Contrary to popular belief, acoustics are not managed solely by visible solutions (panels, ceilings, baffles).
Vertical walls play a huge role in reverberation.
Mineral and plant-based materials have natural acoustic properties thanks to:
- Their porosity,
- Their microfiber structure (linen),
- Their granular variations (marble, lime),
- Their ability to dissipate sound energy.
The combination of a plant-based material (flax) and a mineral material (lime + marble) allows for:
- Absorption of high and medium frequencies,
- A decrease in echoes,
- A reduction in sound harshness.
It is a discreet, durable, and particularly effective alternative in demanding spaces.
3. The role of linen in acoustic performance
Linen is a lightweight, flexible, naturally porous plant fiber.
Its internal structure allows it to absorb some sound waves, creating a dissipation effect.
The acoustic benefits of linen:
- Absorption of some conversation noise,
- Resonance attenuation in corridors,
- Improved acoustic comfort in meeting rooms,
- Reduction in perceived noise in open-plan offices,
- A more relaxed atmosphere in schools.
This ability makes linen an ideal material for decorative wall coverings.
4. The role of lime and marble powder
Lime and marble powder provide:
- A texture capable of diffusing sound,
- Micro-porosity that prevents "hard" reflections,
- A natural sound correction effect.
These mineral materials provide a subtle but effective reduction in reverberation, particularly in:
- Building lobbies,
- The stairs,
- Circulation,
- Waiting rooms,
- The offices,
- Company restaurants.
The result: a less aggressive, softer, more comfortable sound.
5. Why applying these materials directly to walls improves acoustics
Reverberation in a room comes largely from smooth surfaces:
glossy paints, synthetic coatings, rigid panels, glass, and tiles.
Applying a mineral-plant coating to walls directly modifies acoustic reflection.
Observed effects:
- Reduction in reflected waves,
- More even sound distribution,
- Smooth frequency absorption,
- More immersive sound environment.
It is a discreet, non-intrusive solution, perfectly suited to buildings where large acoustic panels cannot be installed.
6. Resolving common acoustic issues on construction sites
Mineral and plant-based materials address several common issues:
- Rooms with too much reverberation
Corridors, halls, waiting rooms, classrooms...
→ Bio-based flooring naturally reduces reverberation.
- Difficult conversations to hear
Offices, open spaces, meeting rooms...
→ Improved intelligibility.
- Hard noise, echoes
→ Mineral materials diffuse sound rather than reflecting it violently.
- Annoying acoustics in restaurants or public spaces
→ A more relaxed atmosphere, a more pleasant ambiance.
7. A material that is acoustically effective, yet also durable and environmentally responsible
Mineral and plant-based materials do more than just improve acoustics: they also meet other essential criteria.
- Reduced environmental impact
Linen and lime have a low carbon footprint.
Marble powder is a stable and durable mineral material.
- Indoor air quality
Bio-based coatings have virtually zero emissions and, in the case ofAbsolin, absorb certain VOCs, thereby improving the indoor environment.
- Durability
Resistance to microcracks, good durability over time.
- Aesthetics
Modern textures, high-end finishes, natural visual rendering.
8. Where can mineral and plant-based coatings be used to optimize acoustics?
There are numerous areas of application:
- Open offices
Reduction of noise stress and fatigue.
- Meeting rooms
Improved intelligibility and comfort of communication.
- Schools and daycare centers
A calmer atmosphere, better concentration.
- Healthcare buildings
Serene atmosphere, enhanced perception of comfort.
- Restaurants and cafeterias
Soothing acoustics, more pleasant atmosphere.
- Reception areas, lobbies, circulation areas
Reduction of the "echoing hall" effect.
- Hotels
Warm and upscale atmosphere.
9. Implementation: how to ensure optimal acoustic performance
Recommended steps for achieving optimal acoustic results:
- Prepare the substrate properly
Cleaning, degreasing, repairing dents.
- Apply an even first coat
To ensure even absorption.
- Work on the texture according to acoustic requirements
The lighter and grainier the texture, the more effective the absorption.
- Apply a suitable topcoat
To ensure durability and aesthetics.
- Ensure sufficient thickness
Acoustic performance increases with thickness.
Mineral and plant-based materials are a natural, discreet, and extremely effective acoustic solution.
By working directly on vertical walls, they improve acoustic comfort without the need for visible equipment.
Absolin, a bio-based coating made from flax, lime, and marble powder, perfectly illustrates this new approach:
improved acoustic comfort, high-end finish, low carbon footprint, and improved air quality.
For architects, contractors, and project owners, this solution addresses three challenges simultaneously:technical performance
, overall comfort, and environmental sustainability.