Acoustic metal doors are designed to provide sound insulation and structural durability and, therefore, are most often placed in spaces where the need for noise reduction is acute. Such doors are made with metal sheets of high quality-such as galvanized steel or stainless steel-and internal sound-insulating cores such as mineral wool, honeycomb structure, or polyurethane foam. In a... https://www.envirotechltd.com/acoustic-door