To improve sound absorbing and insulating performance and weather resistance and to upgrade maintainability, by embedding a reinforcing mateal in a sound absorbing plate made of porous concrete mateal, and covering one side surface of the plate with a coating material, thereby increasing in size a sound absorbing and insulating member.
A sound absorbing and insulating member 1 comprises a reinforcing material 4 embedded in a sound absorbing plate 1 made of porous concrete material, and a coating material 2 mounted at one side surface side of the plate 1 to cover the surface. As the material 4, a reinforcing bar is preferable in view of strength and easiness of manufacturing and processing. And, when a bundle material of carbon fiber or aramid fiber is used as the material 4, a sound absorbing plate 3 becomes light weight, and is hence preferable in handling. And, as the material 2 covering the one side surface side of the plate 3, it is made of material of a surface-like material for not substantially pass the air. As the material 2, an iron plate is preferable in view improvement in sound insulation since the iron plate is easy to be processed with large specific gravity.
JIYOUFU TETSUMASA
ASAI TORU
