TOPPERFO® Bubble are perforated acoustic panels with different drilling diameters in a random arrangement. Plasterboard ceilings with different hole sizes have been on the market for years. Now the same design is available as type Topperfo® Bubble. Two different arrangement of hole patterns are available: Topperfo® Bubble #2 with an alpha-w value of 0.5 and Topperfo® Bubble #3 with an alpha-w of 0.7 at 56mm suspension. Both versions are available in all common surfaces of the current interior design, in the versions veneered, lacquered, or coated. Also, in all fire classes.