The Acoustic Fabric With Excellent Fire Rating: Certified According to EN ISO 13773-1 and NFP 92503-M1
Fire protection class M1 and maximum acoustic transparency
The specially developed acoustic fabric FR combines optimum preventive fire protection with the outstanding acoustic properties that characterise all acoustic fabrics from Akustikstoff.com. It has been certified by the French test institute FCBA in accordance with the highly demanding French standard NFP 92503 M1. Akustikstoff FR even exceeds the requirements of German DIN 4102 B1 and EN 13773, as M1-certified materials tend to be non-flammable.Continue
Acoustic fabric FR enables optimum fire protection in interior design, trade fair, stage and shop construction as well as in advertising technology, exhibitions, concerts and events without compromising on acoustic transparency. Whether as a loudspeaker fabric or for countless decorative applications: The flame-retardant FR acoustic fabric is the perfect acoustic fabric for use in
- Event locations, discos and live clubs
- Trade fair and exhibition halls
- Showrooms and shops
- Theatres, operas, playhouses and cabarets
- Cinemas and at film festivals
- Hotels, restaurants, cafés and other catering establishments
- Schools, universities and other educational institutions
- Museums and galleries
- Libraries
- Sports stadiums
- Office and administrative buildings of all kinds
- Event tents and at festivals
- All other public buildings
Sample set Speaker Cloth FR, flame retardant
Speaker Cloth FR 50 x 160 cm
Speaker Cloth »FR« flame retardant, various cuts
Speaker Cloth FR by the metre 160cm wide
There are two sound transparency measurement diagrams for every type of acoustic cloth available from Akustikstoff.com:
Diagram 1 shows the measurement in decibels (dB). It indicates how strongly sound is attenuated across different frequency ranges.
Diagram 2 shows the measurement in dBFS (decibels relative to Full Scale). This is a digital reference measurement that represents the acoustic behaviour in relation to the maximum signal level.
Each diagram contains several curves illustrating the effect of fabric tension (stretching):
- without fabric → reference measurement (open transmission)
- fabric at 0% stretch → unstretched condition
- fabric at 3% stretch → typical installation tension
- fabric at 5% stretch → maximum recommended tension
These measurements demonstrate how minimal the influence of the speaker fabric is on sound reproduction. Even at different tension levels, the sound transparency remains virtually unchanged.