Noticias

There is almost no plane on the surface of Henan Chalco aluminium foam panels that can reflect sound waves, so when sound waves hit the surface, they diffuse and absorb sound.In addition, the air inside the tunnel under the effect of sound waves, compression, expansion deformation will happen in the process, there is also a part of the sound energy into heat energy, the energy conversion is irreversible, also have contribution to sound absorption, the pore structure of foam metal influence on the ability to absorb sound waves, and the different pore structure of aluminium foam panels materials with different frequency sound absorption ability is different.The plates absorb sound in two ways: surface diffuse absorption and perforated helmholtz resonance absorption.



There is no plane on the surface of the closed cell aluminium foam plate, which diffuses the incident sound wave and dissipates the sound energy.In addition, due to the special structure of closed-cell aluminium foam plate, different surface shapes are formed during cutting because of the different positions of the foam holes.The closed-cell aluminum foam can be used to form an infinite number of parallel helmholtz resonators.When sound waves act on the nozzle, the air in the short tube vibrates as a whole like a piston, causing friction with the wall of the short tube and consuming sound energy.Since the inner surface of aluminium foam panels is relatively rough and the damping property is large, the sound wave enters the cavity and is blocked by the rough bubble wall, which causes many times of reflection and refraction, resulting in the friction between the medium and the surface of Henan Chalco aluminium foam panels rough wall film, which turns the sound energy into heat energy dissipation.