Advantages
- High sound absorption in the mid-to-high frequency range
- Suitable for outdoor use (resistant to UV and moisture)
- Will not rust, warp or rot
- Minimal maintenance over many years
- Strong, lightweight structure
- Clean, modern architectural design
- Exceptionally long service life
- Significantly improves speech clarity
- Can be integrated into a wide range of projects
TYPE L provides a targeted acoustic solution for spaces that require a balance between design and performance.
It is particularly suited to architectural projects that need reverberation control without adding weight to the structure or compromising the look of the space.
Technical description
The TYPE L panel is based on patented Stillness technology and functions as a sound-absorbing element (absorber) with a multi-layer structure optimised for absorbing sound waves.
The outer layer is designed to be acoustically transparent, allowing sound waves to pass into the panel core, where damping takes place and sound energy is converted into heat.
The panel core is made of a sound-absorbing material with a porous/foamed structure that provides airflow resistivity – a key parameter in the absorption of mid and high frequencies.
The panel combines the following mechanisms:
- Absorption
- Partial diffusion
- Reduction of direct sound reflections
In this way, it improves the decay time (RT60), reduces flutter echo and improves the uniformity of the sound field in the space.
Applications
- Architectural spaces – offices, halls, public buildings
- Studios, recording rooms and podcast rooms
- Industry – factories, machine rooms
- Infrastructure – railway stations, tunnels, technical facilities
- Acoustic wall and ceiling cladding
- Outdoor acoustic solutions
- Public buildings
Technical specifications
- Product type: multi-layer acoustic panel
- Technology: Stillness Technology (Japan)
- Outer layer: aluminium fibre (natural micro-perforation)
- Core: acoustic resin foam
- Internal structure: honeycomb
- Function: noise absorption and reverberation reduction
- Resistance: UV / moisture / water / outdoor conditions
- Maintenance: minimal
- Service life: up to approx. 50 years
- Suitability: indoor and outdoor
Installation
Installed on walls or ceilings using dedicated framing or suspension systems.
Can be incorporated as full-coverage or localised acoustic cladding, according to the acoustic design.
For optimal performance, we recommend that design and installation follow the requirements of an acoustic consultant.

Manufacturer data
- Manufacturer: Shizuka Co., Japan
- Technology: Stillness
- Suitability: indoor and outdoor
- Environmental resistance: high (UV / moisture / corrosion)
- Intended use: advanced acoustic solutions for architecture, industry and infrastructure
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