According to"2023 China Noise Pollution Prevention and Control Report".Display,In 2022,The total number of noise complaints and reports accepted by all channels in cities at and above the prefecture level across the country is about450.30,000 pieces, a year-on-year increase49.30,000 pieces
It can be seen that the public is increasingly concerned about the noise problem that affects their lives, so that they are determined to renovate their homes to improve the living environment. In light of the backstage controversy over soundproofing solutions, it was sorted out todaySound insulation is a common problem, for your answers and references.
Why is soundproofing so complicated?
Let's start at the source, sound insulation is a means of preventing sound wave energy from entering or leaving a specific space. Common soundproofing methods are as follows:
Deflection
Deflection of soundIt is achieved by increasing the mass and density of any structure such as walls, floors, or ceilings. By adding mass and dense material between the sound source and the receiving point, the additional volume that the sound wave must pass through will be provided, reducing its energy propagation.
For example, the traditional wall structureIncrease in mass and density, by adding the thickness of concrete or dense veneer (e.g. shelves, OSB, drywall or drywall).
However, in today's era where every inch of land is at a premium, this method wastes a lot of space and is not suitable for practical applications. In addition, this practice also has the characteristics of too many artificial adjustment factors, resulting in too large differences in effects and insufficient cut-off frequency.
Use standardMulti-composite structural materials, and products with third-party test reports can avoid the above problems.
Absorption
material with perforated absorption, for example:Acoustic cotton, which absorbs the sound energy that enters it. They come in different thicknesses and densities and are usually installed in the cavity between the acoustic panel and the keel, which is used to form a sound insulation layer in conjunction with the acoustic panel.
Damping
Constraint layer dampingThe principle is to use a specific material in a specific ratio to reduce the natural resonance frequency of the structure, thereby reducing lateral transmission from one side of the structure to the other. When applied between two rigid panels, the damping compound is effective.
So, when the sound hits it, the shear force between the panels creates friction in the damping layer, and the sound stops as it converts to heat, essentially happeningThermal conversion
Is soundproof cotton effective
Cotton is useful, but it depends on what it is used for!
Strictly speaking, cotton is not called "soundproof cotton", but should be called".sound-absorbing cotton".。It is also a kind of acoustic cotton.
Acoustic cottonThe role is determined by its own structure. Cotton can work mainly because it has a large number of small joints insideHoles。When the noise energy passes through the acoustic cotton, a specific part of the sound energy is absorbed by frictional motion with the air in the internal holes.
Schematic diagram of the pore channels inside cotton.
And this specific part of the sound energy refers to the middle and high frequency range of the noise. In layman's terms, acoustic cotton can absorb sound in the middle and high frequency range. However, for low-frequency noise and noise with large decibels, the improvement effect is limited.
So install it separately at homesound-absorbing cotton"., to prevent the intrusion of noise is limited. The best with the professionalSoundproofing productsCombine and match for best resultsStructural layer。In addition, it is better if the other five sides of the home can be treated at the same time to form a seamless strong sound insulation layer. Because noise travels not only from the air, but also from structures, any crevices or wall vibrations can cause noise intrusion.
What kind of board is generally used for sound insulation?
Generally, products with high density and high hardness are selectedDamping acoustic panelswithCarbon plastic acoustic panelsBoth.
Damping acoustic panelsIt is usually made of three or more layers of materials with different densities and characteristics, which are formed by high-pressure laminationSandwich damping constraint structure。When a sound wave is incident on the structural surface of a multilayer composite, the sound wave undergoes a process of reflection and transmission in each layer. The reflected wave and transmitted wave are reflected and transmitted between the interfaces many times, and the sound wave energy through the wall system is reduced at the highest
Carbon plastic acoustic panelsIt is the first paint-free, zero-emission, antibacterial, anti-corrosion, waterproof, flame-resistant and soundproof board. It is made of carbon and plastic modified in a certain proportion, and the weight is only iron, light weight and high strength,Prefabricated with finish designIt can be directly used as a wall, which can easily realize the lightweight of sound insulation decoration, free from the construction period and cost of secondary engineering paint coating, beautiful and practical, and full of sound insulation effect.
No matter what kind of board is chosen, environmental protection formaldehyde-free is the most concerned point of the public, according to the test report, Dr. OFF sound insulation boardFormaldehydeThe amount of release＜0.005mg/m³Far better thane0Environmental protection level.
How long does it take to do soundproofing?Take oneAbout 10 square metersThe room, do the whole house soundproofing calculation, the whole soundproofing decoration processIt takes at least 8 days；Switch to the installation method of carbon plastic panels2-3 daysThe whole process can be completed, and the renovation is complete and ready to move in.
How much indoor space will be sacrificed by doing soundproofing?Each space wants to deal with different sound sources, and the structural design of the solution will also be adjusted. For example, the sound of talking, the sound of television, the sound of upstairs walking and other structural impacts, etc., the space required for the overall structure is from4-12cmRange.
The specific structure can be consulted in the background, and the sales engineer will provide solutions according to the actual situation.
In the next issue, we will continue to share with you questions and answers related to sound insulation, if you have any questions about sound insulation, please leave a message in the comment area