One-way sound insulation


Installations in the void between the structural soffit and the suspended ceiling, such as piping and ductwork systems, can give rise to noise. In such cases, a sound insulating suspended ceiling system can be used to reduce the noise to acceptable levels in the room below.

One-way sound insulation values 

Laboratory value Rw according to ISO 140-3 and ISO 717-1

Product Laboratory value Rw

Combison Duo A

32 dB

Combison Duo E

33 dB

Combison Uno A

27 dB

Combison Uno Ds

28 dB

Combison db A

21 dB

In order to determine the noise level generated by a source in the void, you should ascertain the frequency spectra of the suspended ceiling's sound insulation and the noise source.