Acoustic metal suspended ceilings for use in corridors and / or office spaces. The product is made of more than 98 % of steel, the other components are paint and for some product an acoustic veil. Given the properties of the steel and the coating, the ceiling plates manufactured are robust and have a high fire performance. In addition to that, the perforation and lining of metal ceilings contribute to sound absorption in order to create acoustic comfort. Gabelex ceilings can be fully recycled at end of life. They are easy to maintain, produce no dust, and are inert. They do not promote microbial growth.