Flanking sound transmission of cavity and raised floors

Acoustics

Installation eines Doppelbodens
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Horizontal Airborne and Impact Sound Transmission of Raised and Hollow Floors

At Fraunhofer IBP, sound insulation tests for raised and hollow floors are conducted using various test facilities, including the wall and ceiling test stand, all of which meet the requirements of the DIN EN ISO 10140-5:2021 standard. The flooring system to be examined is installed directly onto the concrete floor of the test stand. A highly sound-insulating partition wall extends from the ceiling to just above the surface of the raised floor between the source and receiving rooms. This partition wall is fitted with mineral wool and a permanently plastic seal to minimize flanking transmission. Measurements are carried out using dodecahedron loudspeakers, standard tapping machines, and rotating microphones. The system’s flexibility allows for the testing of various floor systems, including those with air outlets or floor bulkheads.

Vertical sound transmission measurements are carried out, for example, in the P9 screed test stand at Fraunhofer IBP. The test stand meets the requirements of DIN EN ISO 10140-5:2021. Its 140 mm thick steel-reinforced concrete bare floor is rigidly connected to the building. The flanking walls are solid components, with additional cladding attached to suppress flanking transmission. With state-of-the-art measurement technology and many years of experience in building acoustics, the experts at Fraunhofer IBP support you in optimizing the acoustic efficiency of your flooring systems. Our tests provide reliable results that meet all the relevant standards, enabling you to sustainably improve product quality, increase customer satisfaction, and achieve market advantages. We provide you with the ideal basis for developing innovative solutions tailored to demanding architectural and acoustic requirements.

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Measurement

standardized flank sound pressure level, standardized flank sound pressure level difference (horizontal sound transmission)

sound reduction index, standardized impact sound pressure level, impact sound pressure reduction (vertical sound transmission)

Standard DIN EN ISO 10848-2, DIN EN ISO 10140
Measurement object Cavity and raised floors, floor systems with air terminals, bulkheads (absorbent, boards)


Technical data

Floor area (2 rooms) 21.5 m² and 24 m²
Room volume (2 rooms) 66.9 m³ and 74.5 m³
Entrance doors (H × W) 1.990 × 0.835 and 2.02 m × 1.95 m
Height of the floor system Variable


Special feature

Max. sound reduction (related to the size of test sample) R'max,w = 89 dB

 

More information

  • The height of the floor system can be varied but will influence the room volume.
  • The separating wall above the floor system is made of a multi-layer panel construction with high sound insulation.