INORGANIC LAMINATED BODY

摘要

PURPOSE: To prepare an inorganic laminated body having an excellent sound absorption coefficient against sounds of a wide range of frequency bands. CONSTITUTION: This inorganic laminated body is made by laminating plural inorganic porous bodies having >=0.5cm<3> .cm/cm<2> .sec.cmH2 O permeability. At least one of the above mentioned inorganic porous bodies should have <=60 cm<3> .cm/cm<2> .sec.cmH2 O and each porosity of inorganic porous bodies differs in >=0.02 to each other.