Ceiling acoustic insulation consisting of a 60/27 mm galvanised steel sheet structure, suspended from the slab by means of shock absorbers, onto which two 12.5 mm gypsum plasterboard panels will be screwed, with a self-adhesive synthetic acoustic insulation sheet with an asphalt-free polymer base of 2,000 Kg/m3 density, 7 Kg/m2 and 3.5 mm thickness TECSOUND SY 70 between panels; placement of absorbent material such as mineral wool of 50 mm thickness and density 50 Kg/m3 in the air chamber.