Hello! For an existing interior wall without doors or penetrations, which is built with 70 mm wooden studs, insulation, OSB, and single drywall, and is built as a tension wall against 14 mm parquet flooring on a concrete foundation -- how much more will it dampen by:
1) An additional layer of drywall on both sides of the wall?
2) A separate wall with 45 mm wooden studs, insulation, and single drywall built 3 cm from the existing wall?
Are there other better options to further dampen without tearing down the existing wall? Apart from earplugs, of course.
