Building acoustics products
We help the construction product industry develop wall and floor structures that work in terms of sound technology. As an accredited (FINAS) laboratory, we conduct sound insulation measurements on wall and floor structures in accordance with EN ISO 10140 and EN ISO 717 as well as absorption measurements on upholstery materials in accordance with EN ISO 354.
Our services cover
- Product development
- Type testing
- Quality control
Measured structures
- Walls, windows, doors and make-up air vents
- Floors and subfloors
- Floor surfaces and coatings
- Upholstery materials and furniture
- Noise barriers
- Suspended ceilings
- Sealants and joints
Airborne sound insulation
In our laboratory, we conduct airborne sound insulation measurements on building parts in the frequency range of 50–5,000 Hz. We report the results using the weighted sound reduction index Rw (unit insulation Dn,e,w fresh air vents, channels). In the report, we also present the spectrum adaptation terms C and Ctr for airborne sound insulation.
We also conduct sound insulation measurements on the facades or structures between flats of finished buildings. The results can be used to verify that the sound insulation requirements issued by the Ministry of the Environment or the requirements set on facades in land use plans are met.
We conduct impact sound insulation measurements on floors and their surface structures in the frequency range of 50–5,000 Hz. We report the results using the impact sound pressure levels Ln,w and the spectrum adaptation terms for impact sound insulation.
When measuring floating floors, parquet flooring and other floor surfaces, we report the reduction of impact sound level Lw and assess the usability of the structures in question for Finnish concrete subfloors. We also conduct impact sound insulation measurements on the floor structures of finished buildings.
Absorption characteristics
In demanding public spaces such as concert halls, it is important to control the reverberation time. In day care centres and other public spaces, it is often enough to just attenuate the noise (shorten the reverberation time). In both cases, it is important to know the absorption characteristics of the upholstery materials and furniture.
We conduct absorption measurements on upholstery materials and, for example, seats in acoustic spaces using the reverberation chamber method (measurement of reverberation with and without the upholstery material) and a sample space of around 12 m2 or a representative number of seats.
Test equipment and facilities
We have excellent laboratory facilities and modern measuring equipment for precise measurements:
- 5 reverberation rooms insulated from their surroundings using sound and vibration technical means
- Powerful speakers for the production of sound
- Rotating microphones calibrated almost daily for the exact measurement of sound pressure
- Sound analysers
- Equipment for vibration measurements
