(1) sound insulation performance (obturator) : when the sound frequency is between 800 -- 4000HZ, the sound insulation coefficient of aluminum foam in the obturator reaches above 0.9.
(2) sound absorption performance (micro-through-hole and through-hole) : when the sound frequency is between 125-- --4000HZ, the maximum sound absorption coefficient of through-hole aluminum foam can reach 0.8, and the average sound absorption coefficient of its octave range exceeds 0.4.
（3）Excellent electromagnetic shielding performance: when the electromagnetic wave frequency is between 2.6-18ghz, the electromagnetic shielding amount of aluminum foam can reach 60-90db.
The application of Sound insulation aluminum foam panels :
1:Used in concert hall, cinema, recording studio, studio, dance hall, gymnasium, subway station, waiting hall, waiting room, hotel lobby, large shopping mall, exhibition hall, office hall, news room, computer room and other places to control the sound reverberation time.
2:For pipe muffler, muffler elbow, static pressure box, especially suitable for clean workshop, food production workshop, pharmaceutical factory, precision instrument manufacturing workshop, laboratory, ward, operating room, dining room, ship engine room, auxiliary engine room, cabin and other places of air conditioning and ventilation equipment noise reduction.
3:In urban light rail, elevated road, traffic trunk road, highway, railway, overpass, cooling tower, open-air high-voltage substation, concrete mixing field and other places play the role of sound absorption barrier.
4:In diesel engine, generator, motor, internal combustion engine, freezer, air compressor, aircraft, train, automobile, ship, boiler, forging hammer equipment, fan and other equipment, can be sound absorption, sound insulation, muffler effect.
