1. How to Buy Sound-Absorbing Materials?
Difference between soundproof and sound-absorbing
We should consider the material we want to select is mainly used as a sound-absorbing
effect, or the effect of noise insulation at the purchase of sound-absorbing material. First of
all, you want to see what effect you want, soundproof is different with sound-absorbing. What
sound-absorbing solves is source in the main space is reflected leaving the original sound
distortion, the approach is to reduce the amount of sound reflection in the main space. What
the soundproof solves is the audio outside space affected by the audio transmission. The
main way is to abatement audio transmission energy, prevent the audio transmission routes.
The acoustic panels will have the effect of noise insulation when being used together with the
noise carpet or sound-absorbing cotton.
First, the sound absorption coefficient, what is the sound absorption requirement you need.
Sound-absorbing material has small reflect on the incident sound energy, this means that
sound can easily enter and go through this material; we can imagine that the material should
be porous, porosity and breathable, and this is typical porous suction acoustic materials,
which forms a porous structure with usually fibrous, granular, or foamed material in the
process; its structure is characterized by: the material has a large number of mutually
penetrating micropores, which means it has a certain permeability. When the sound waves
incident to the surface of the porous material (such as polyester fibers absorbing plate), it
causes vibrations in the air in the micropores, and due to frictional resistance and viscous
drag of the air and the heat conduction, a considerable part of the sound can be converted
into heat, thereby have the suction sound effect.
1. Whether the wall is lightweight wall? Does the room nearby has soundproof need? If yes,
then you must first do wall acoustic treatment before mounting surface layer of sound
absorption panels;
2. Sound-absorbing materials can select wood piercing sound-absorbing panels (fixed on the
wall by keel, the cavity is filled with sound-absorbing cotton), and can also choose polyester
fiber decorative sound-absorbing board (directly attached to the wall);
3. You should particularly pay attention to environmental protection and fire-retardant
problem of sound-absorbing material, because this is the major event of the life and limb.

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absorbing-materials.htm