The most common error is to cover a large area of the walls with some type of thin foam (50mm or less) or carpet/drapes. The problem is that these acoustic treatments are only suitable for absorbing higher frequencies, 500 hz and above. Widespread high frequency absorption creates a dramatic change to our perception of a room or space. The result is a room that sounds extremely boomy and muddy, resonating freely at lower frequencies. Sound Acoustics are proudly Australian made, with all product design, research, development and manufacturing taking place in Australia. We are passionate about providing acoustic foam products that offer the very best in performance, as well as providing simple and practical installation solutions.