International
Spain
Sweden
Aim
To reduce sound reverberation and maintain comfortable sound levels though absorptive ceiling and wall surfaces.
Detailed requirement
Part 1: Ceilings
The following spaces, if present, have ceilings that meet the specifications described:
- Open workspaces: minimum NRC of 0.9 for the entire surface area of the ceiling (excluding lights, skylights, diffusers and grilles).
- Conference and teleconference rooms: minimum NRC of 0.8 on at least 50% of the surface area of the ceiling (excluding lights, skylights, diffusers and grilles).
Part 2: Walls
The following spaces, if present, have walls that meet the NRC specifications described:
- Enclosed offices, conference and teleconference rooms: minimum NRC of 0.8 on at least 25% of the surface area of interior surrounding walls.
- Open workspaces: minimum NRC of 0.8 on at least 25% of the surface area of the surrounding walls.
Partitioned office spaces: partitions reach at least 1.2 m [48 inches] and have a minimum NRC of 0.8.
Part 3: School Ceilings
The following spaces have ceilings that meet the specifications described:
- Spaces less than 6,000 m³ [20,000 ft³]: NRC of at least 0.7 for the entire surface area of the ceiling (excluding lights, skylights, diffusers and grilles).
See detailed requirement for Sound reducing surfaces
Our contribution
Eurocoustic presents a wide range of products that combine acoustic absorption and lateral attenuation to improve the quality of listening and intelligibility of the exchanges inside the premises. Eurocoustic ceilings are a suitable solution for the absorption of sounds, thus reducing the phenomenon of resonance.
The majority of our ceilings are class A, with a maximum absorption level. Hence, our ceilings contribute greatly to the control of the reverberation time.
ACOUSTIC ABSORPTION CLASS |
αw |
|
A |
0,90 - 0,95 - 1,00 |
|
B |
0,80 - 0,85 |
|
C |
0,60 - 0,65 - 0,70 - 0,75 |
|
D |
0,30 - 0,35 - 0,40 - 0,45 - 0,50 - 0,55 |
|
E |
0,25 - 0,20 - 0,15 |
|
Unclassified |
0,10 - 0,05 - 0,00 |
Table B.1 of the NF EN ISO 11654 standard
