Key advantages
• Effective sound absorption at mid-to-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
The 2.5 cm thickness offers an excellent solution for improving acoustics in spaces with no room for thicker materials.
Particularly suited to architectural projects where a clean, slim look matters – while still delivering a noticeable acoustic improvement.
Technical description
An acoustic board based on polyethylene foam (closed-cell), designed for sound absorption and reverberation reduction in interior spaces.
The material has a closed-cell structure that enables 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 call for 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-to-high frequencies
Significantly reduces reverberation
Airflow resistance:
Approx. 510,000 Rayls/m²
Installation
• Direct bonding to the wall or ceiling
• Can be installed with a dedicated adhesive
• Option to install inside plasterboard framing
• 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
