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Metal Foam with Improved Sound Absorption The most common sound absorption material is porous glass wool fiber, which is inexpensive, but it has poor tolerance of temperature changes, low strength, and softness. In addition, its sound absorption decreases over time [35]. This porous fiber can also damage the human skin, respiratory system, eyes, and mucosa during production and installation. Compared to the other kinds of sound absorption materials, metal foams are stable; their sound absorption coefficient remains about the same over long periods. Hence, metal foams are a new generation of environmentally friendly materials. Despite this, they have some unsatisfactory aspects, so improvements have been made to metal foams to increase sound absorption [21]. SAI INSULATION INDIA NO- 14, GROUND FLOOR, KALIKA NAGAR, ANDRALLI MAIN ROAD,NEAR PEENYA 2ND STAGE,BANGALORE - 58 Ajay 9738386050 9900190088 saiinsulationindia@gmail.com Delars in ROCKWOOL,MINERALWOOL,FIBER GLASSWOOL,LOOSE GLASSWOOL,NITTRIL RUBBER,ROCKWOOL LRB,XLPE FOAM, CERAMIC WOOL EXT STAGE,BANGALORE – 58
