What are the precautions for the purchase of indoor sound insulation materials?

Sound insulation material refers to a kind of material, component or structure that can block sound propagation or weaken transmitted sound energy, and is characterized by heavy mass and high density, such as steel plate, lead plate, concrete wall and brick wall. It is usually used in the office or KTV. Sound insulation refers to the isolation, partition and separation of sound or noise through something, so sound insulation materials are needed. The number of decibels related to the incident sound energy on one side of a material and the transmitted sound energy on the other side is the sound insulation capacity of the material, which is usually expressed by the symbol R(dB).

Sound insulation materials or components will have different sound insulation effects due to different use occasions and different testing methods. For sound insulation materials, in order to weaken the transmitted sound energy and block the spread of sound, they should not be porous, loose and breathable like sound-absorbing materials. On the contrary, their materials should be heavy and dense, such as steel plates, lead plates, brick walls and other materials. Sound insulation material The requirement of sound insulation material is dense without pores or gaps; It has a large weight. Because this kind of sound insulation material is dense, it is difficult to absorb and transmit sound energy, but its reflection energy is strong, so its sound absorption performance is poor. Sound insulation materials can attenuate the transmitted sound energy to 1-3~1-4 times or less of the incident sound energy. For the convenience of expression, the sound insulation amount is expressed in decibels.

There are many small holes in the sound-absorbing material. When the sound waves enter, they will be reflected, so the sound will become smaller after the sound waves are superimposed. Therefore, the sound-absorbing material is used to prevent echo, and is generally used in studios, cinemas and other places where echo is easy to occur. The sound insulation material is to keep the sound out, which is generally used in places with high privacy such as bedrooms.

Choose materials: including aluminum profile, glass, hardware, whether the color is consistent, and whether the hardware assembly is complete.

Look at the processing: high-quality aluminum alloy windows have fine processing, smooth tangent and consistent angle (the main frame is usually at 45 degrees or 9 degrees), and there should be no obvious gaps and smooth opening and closing during the splicing process.

look at the glass: look at whether it is hollow glass or not and whether it is coated. The coated composite film is generally corrosion-resistant, wear-resistant and high gloss.

check the size: check whether the window size is correct.