| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing, at a lower cost, a porous sound absorbing ceramic compact such as a sound absorption brick and a sound absorption tile and the like which has good sound absorbing power for a wide sound range convering low to high frequencies. SOLUTION: The porous sound absorbing ceramic compact consists of a porous ceramic body having communicating pores whose bulk specific gravity is 0.5-1.0. The ceramic compact is a sintered body in which perlite of 100 pts.wt, whose particle diameter is 0.5-2.0 mm is enclosed with one or more kinds of sintered materials of 100-200 pts.wt. selected from among a fly ash, chamotte, wollastonite, slug, silica, volcanic eruptive rock, rock and/or clay mineral and an inorganic binding material of 10-20 pts.wt. as parent matter while the perlite particles develop communicating pores at their contact points to produce internal communicating pores.
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