Two different problems
Sound absorption is about the sound inside a room: reverberation and echo. Sound insulation is about how much sound passes from one room to another. A room can have good absorption and still let you hear everything from next door.
Absorption reduces reverberation
Absorbers are porous or perforated surfaces that take energy out of the sound. Acoustic ceilings, baffles, sound sails and wall panels are all absorbers. The effect is measured as reverberation time: the shorter it is, the clearer and calmer the room.
Insulation stops sound between rooms
Insulation needs mass, airtightness and good joints. The wall construction, the door and the seals decide how much sound gets through. An acoustic panel on a wall changes almost nothing about what can be heard in the next room.
The typical mistake
The most common mistake is buying acoustic panels for a meeting room to solve an insulation problem. The result is a room that sounds calmer inside, while the conversation can still be heard outside. A sound rated door and a tight wall are the right answer there.
In practice you often need both
In a meeting room, a sound rated door and tight walls are combined with absorbers in the ceiling or on the wall. In an open plan office absorption matters most, because the problem is reverberation and conversations across the room. We help establish which problem you actually have before products are chosen.