Airborne and Impacts Noises, to use where ceiling height is a problem. Will lower ceiling with 2-3 cm. After existing joist are exposed resilient bars are fixed to it. This system utilise mineral wool and two layers of acoustic plasterboard 19mm and 12,5mm. All joints will be sealed with acoustic mastic.

Ceiling Height Loss: 29-35mm or 1inch (ceiling removed)
Airborne Sound (improvement db)*: 19db
Improvement Sound (improvement db)*: 16-17db

*This is an estimated reduction. The result will depend on the existing structure.