The main characteristics of aluminum foam acoustic panels:
1, high-tech, composite foam aluminum plate, good acoustic performance, acoustic barrier, light weight, beautiful, fireproof, not afraid of water, good physical properties, easy processing, made of it into various forms of sound-absorbing body, muffler, sound insulation structure, sound barrier, muffler room, sound insulation cover, etc., can directly face the noise source, without any protective panel and other sound-absorbing filler.
2、It has excellent acoustic performance: average sound absorption coefficient ≥0.60 (125-4000Hz frequency range); meanwhile, it has excellent acoustic performance that the sound absorption performance does not change after spraying water and spraying ash on the board.
3, foam aluminum plate by aluminum alloy die-casting molding, broken, can all be recycled, is currently no secondary pollution to the environment of green high-tech products.

Aluminum foam acoustic panel performance test results
■ Pore characteristics and bulk density
Main pore size: 0.9mm, 1.6mm, 2.5mm three specifications, commonly used specifications for 1.6mm pore size.
Porosity: 60-80% (68-78% at 1.6mm pore size)
Through-hole rate: 85-95% (90-95% at 1.6mm aperture)
Bulk density: 0.5-1.10g/cm3 (0.60-0.85g/cm3 for 1.6mm aperture)
■ Combustibility: measured according to GB/T5464
Sound-absorbing board burning properties in line with GB8624 non-combustible class materials (Class A): non-combustible materials.
■ Moisture absorption performance: measured according to GB5480.7
Mass moisture absorption rate W1 <0.1%
Volumetric moisture absorption rate W2＜0.1%
■ Mechanical properties: measured according to GB/T1039-1040
Compressive strength δc: 8.61Mpa (under 10% compression)
Flexural strength δw：8.06Mpa
Tensile strength δb：3.41Mpa
Anti-aging performance: measured according to GB/T14522
Tested by 250 hours No discoloration, no shedding, no aging phenomenon
■ electromagnetic shielding performance: according to GB/12190 and SJ20524 measurement
Shielding effectiveness 40-55dB (80KHz-1.5GHz frequency range measurement)
■ Sound absorption performance: measured by GBJ47 and GBJ88
Average sound absorption coefficient (measured in the frequency range of 125-4000Hz)
Noise reduction coefficient NRC” 0.64 (250-2000Hz frequency range measurement)
■ Sound insulation performance: measured by GBJ75
Air sound weighted sound insulation Rw 28.0dB (i.e. sound insulation index la)
Average sound insulation Ra 24.5dB (measured in the frequency range of 125-4000Hz)
Note: The specifications of the tested acoustic panel are
Acoustic panel (foam aluminum plate) thickness of 8mm, air layer thickness of 100mm, backing plate (color steel plate) thickness of 0.5mm, assembled structure.