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Understanding of the principle of the
wooden sound-absorbing is limited, so to have some wrong understanding,
following by Jiayin wooden sound-absorbing panels to introduce
Wood sound absorption board knowledge: fiber porous sound-absorbing
board material, such as centrifugal glass wool, rock wool, mineral wool,
plant fiber coating, sound absorption principle is the internal wooden
sound-absorbing panels have a large number of tiny connected pores, pore
depth along the acoustic sound absorbing board inside the material, and
the wood ceiling soundboard will sound energy into heat by friction
sound. The absorption characteristics of porous wooden sound-absorbing
panels is gradually increased with the increase of sound absorption
coefficient frequency, I said no good absorption of high frequency
absorption.
Wooden sound-absorbing panels with the same type, light weight, high
strength, beautiful appearance, elegant color, good decorative effect,
three-dimensional sense of strong, simple and convenient assembly.
The necessary condition for sound absorption of porous materials is that
there are a large number of gaps, and the gaps are connected with each
other.
One of the mistakes is that the surface roughness of the material with
sound absorption performance, in fact, for example, stucco stone to
convex concave surface does not have the basic ability of sound
absorption.
The two is that the wrong understanding of material has a large number
of internal holes of materials, such as polystyrene, polyethylene,
obturator polyurethane, has sound absorption performance good, in fact,
these materials due to internal holes no connectivity, not deep inside
the material acoustic vibration friction, so the absorption coefficient
is very small. With the wall or ceiling air layer of perforated plate,
even if the material itself is very poor sound absorption performance,
this structure also has sound absorption performance, such as perforated
gypsum board, wood, metal plates, and even the slit sound absorption
tiles, etc.. This kind of sound is called the Helmholtz resonance sound
absorption, sound absorption resonance principle is similar to the
thermos of material, external space and internal cavity through a narrow
neck connection, the incident wave, the resonance frequency, the air
between the neck and internal space resonance the energy loss effect of
severe. Helmholtz resonance absorption is characterized by a large sound
absorption coefficient at the resonant frequency. Can also sound film or
sheet with the wall or ceiling cavity exists, such as wood, metal plate
made of a ceiling or wall plate, machine sound absorption principle of
this structure is wooden sound-absorbing plate resonance sound
absorption. At the resonant frequency, the vibration of wooden
sound-absorbing panels and a lot of energy absorption. The resonance
absorption of the thin plate is mostly in the low frequency and has a
better sound absorption performance.
Wooden sound-absorbing panels according to acoustics principle refined
processing, both the wood itself and effect, and has good acoustic
performance. Compared with other sound products have originality, is the
preferred decoration materials used at home and abroad. Materials and
color according to customer needs, with cherry, maple, Sapele, black
walnut, red and white (red), red beech, teak, etc. a variety of Mai
Geli, slot and hole type combination of various kinds of styles to
choose from.
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