ALT is the acronym for the materials that comprise one of the IsolDesign solutions for the acoustic correction of public and private environments: Aluminum, Mineral wool and Fabric. Aluminum is the metal of which the 40mm thick frame is designed, which can be hidden, visible or customizable by painting. The inside of the frame is made of a mineral wool undelay with natural binders (based on sugar and lemon) whose fibers are vertically positioned to increase and improve sound absorption. Additionally, the polyester fabric stretched and fixed on the frame is fireproof of Euroclass 1, non-toxic and ecological; moreover it is interchangeable at any time, dry cleanable and is completely customizable in graphics; printable up to approximately 3 meters of light. ALT acoustic panels, certified to absorb low, medium and high frequencies, can be mounted on walls, ceilings, or used as a self-supporting custom partition placed on the ground or on a table