Key advantages
• Effective sound absorption at mid–high frequencies
• Reduces reverberation (echo) and improves room acoustics
• Lightweight material, easy to install
• Does not crumble or shed fibres
• High long-term durability
• Suitable for sensitive spaces (museums / studios)
• Can be integrated with plasterboard systems and walls
• Relatively thin solution – suitable where thickness is limited
Why this product
A 2.5 cm thickness provides an excellent solution for improving acoustics in spaces with no room for thicker build-ups.
Especially suited to architectural projects where a clean, slim look is important – while still achieving a noticeable acoustic improvement.
Technical description
An acoustic board based on closed-cell polyethylene foam, designed for sound absorption and reverberation reduction in interior spaces.
The material has a closed-cell structure that allows efficient absorption of sound waves at mid and high frequencies, while maintaining mechanical stability, moisture resistance and a long service life.
Suitable for applications that require a thin, lightweight and clean acoustic solution.
Applications
• Offices
• Meeting rooms
• Studios
• Commercial spaces
• Living rooms
• Plasterboard ceilings and walls
• Spaces with reverberation problems
Technical specifications
Material: closed-cell polyethylene foam (LDPE)
Density: approx. 25 kg/m³
Thickness: 25 mm (2.5 cm)
Operating temperature: -60°C to +80°C
Moisture resistance: does not absorb water
Structure: closed cell
Acoustic performance
Sound absorption mainly at mid–high frequencies
Significant reduction in reverberation
Airflow resistance:
Approx. 510,000 Rayls/m²
Installation
• Direct bonding to the wall or ceiling
• Can be fixed with a dedicated adhesive
• Option to install within a plasterboard framework
• Edge-to-edge joints for a uniform look
• Can be combined with coverings (fabric / plasterboard)
Performance table
Whisper 50 sound absorption test in a reverberation room
Airborne sound transmission through partitions – test
Whisper FR TDS 2023 (English UK) – technical specifications
Standards Institution of Israel 755 STRATOCEL WHISPER (1)
Standards
EN ISO 354 – sound absorption testing
EN ISO 10140 – sound insulation
EN ISO 717 – acoustic rating
EN 13501-1 – reaction to fire
Up to B-s2,d0 (depending on thickness and system)
ISO 9001 – quality management system
