The acoustic ... panels are built out of individual circles, cut out in a way that uses as much of a 3/16″ (5mm) plywood sheet as possible, with hollow circles serving as frames to attach foam ...

If you want to improve your audio quality then cutting down on echoes is a must, and these acoustic ... While the panels are likely more expensive to build than off-the-shelf foam alternatives ...

or with special materials like acoustic foam or acoustic panels. Learn how to soundproof walls, doors, windows, floors, and ceilings to maintain peace and quiet. To soundproof walls and rooms ...