One-way sound insulation

Illustration of how installations in the void can give rise to noise.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.