Key advantages
• Broadband sound absorption (100 Hz–10 kHz)
• Significant improvement in room acoustics
• Reduced reverberation (echo) and reflected noise
• Lightweight, easy-to-install material
• High long-term durability
• Does not crumble or shed fibres
• Suitable for sensitive spaces (museums / studios)
• Can be combined with plasterboard systems and walls
Why this product
Whisper for interior use offers a precise solution to reverberation and noise problems within a space –
unlike standard materials, it is based on a closed-cell structure that enables effective sound absorption without shedding fibres or wearing out over time.
It is particularly suitable for architectural projects that demand high acoustic performance alongside a clean look and minimal maintenance.
Technical description
A professional acoustic panel based on foamed polyethylene (Closed Cell Polyethylene Foam), designed to absorb sound and reduce reverberation in interior spaces.
Its unique cellular structure enables the absorption of sound waves across a wide frequency range, while maintaining mechanical stability and long-term durability.
In addition, the material does not absorb moisture or crumble, making it suitable for long-term use even in sensitive environments.
Applications
• Recording studios
• Meeting rooms
• Offices
• Commercial spaces
• Museums and galleries
• Showrooms
• Home cinema rooms
• Spaces with reverberation problems
Technical specifications
Material: closed-cell polyethylene foam (LDPE)
Density: approx. 25 kg/m³
Common thicknesses: 25 / 50 mm
Operating temperature: -60°C to +80°C
Moisture resistance: does not absorb water
Structure: Closed Cell
Acoustic performance
Sound absorption coefficient tested in accordance with:
ISO 354 (reverberation room)
Broad absorption across the mid–high frequency range
Significant improvement in reverberation reduction
Partition sound insulation with Whisper 50 mm:
Up to Rw ≈ 37–41 dB (depending on the system)
Installation
• Wall and ceiling installation
• Can be bonded with a dedicated adhesive
• Can be installed within plasterboard framing
• Can be combined with coverings (fabric / plasterboard / boards)
• Edge-to-edge joining for a uniform surface
Performance table
Standards Institution of Israel 755 STRATOCEL WHISPER (1)
Whisper FR TDS 2023 (English UK) Technical Specifications
Airborne Sound Transmission Through Partitions – Test
Whisper 50 Reverberation Room Test
Standards
EN ISO 354 – Measurement of sound absorption in a reverberation room
EN ISO 10140 – Sound insulation between spaces
EN ISO 717 – Rating of sound insulation
EN 13501-1 – Reaction to fire
B-s2,d0 (based on tests)
ISO 9001 – Quality management system
