Isolation

Structure-borne vs airborne sound: the two paths
Airborne sound travels through air and partitions; structure-borne sound travels as vibration through the building. Soundproofing has to deal with both - differently. Read more...
Soundproofing vs acoustic treatment: what's the difference?
Soundproofing stops sound getting in or out; acoustic treatment improves sound inside the room. Different physics - you often need both. Read more...