As people have higher and higher requirements for sound environment and more and more noise is generated, sound-absorbing panels are an ideal sound-absorbing decorative material. There are many sound-absorbing materials, each with its own characteristics. For example, mineral wool sound-absorbing panels, which are widely used at present, have the characteristics of high sound absorption coefficient, thermal insulation, good flame retardancy, excellent flatness, and beautiful decorative effect; they are easy to cut and construct. It has the advantages of simplicity, good stability and high cost performance. It has a variety of colors to choose from, which can meet the needs of sound-absorbing decoration of different styles and levels. So what is the sound absorption principle of sound-absorbing panels?
When it comes to the sound absorption principle of sound-absorbing panels, it is necessary to talk about the transmission and reflection of sound. The principle of sound absorption is to use the characteristics of acoustic transmission to leave sound in the material itself or create a channel that can enter. These channels are composed of countless continuous tiny holes, and some channels are composed of countless fibers crossed together to form gaps. It is precisely because these gaps or passages are too long and messy that once the sound enters, it is like walking into a labyrinth, and it cannot get out. Because the passage is too messy and long, the sound drills back and forth, smashes left and right, and in the process of transmission. The energy is gradually consumed in the middle, and the sound becomes smaller and smaller, which plays a role in sound absorption. So in simple terms, everything with messy, very long microchannels can be used as sound absorption, such as cotton, various fibers, sponges, carpets, and so on.
Before installing sound-absorbing panels, we also need to understand the frequency characteristics of noise. Because sound has different frequencies, it is also different when it is absorbed. High-frequency sound has a short wavelength and is easily absorbed, while low-frequency sound has a long wavelength and can easily penetrate obstacles. For low-frequency sound, it is not only difficult to isolate, but also difficult to absorb. Rather than bumping around in cluttered, tiny passages like high-frequency sounds, it swirls around easily. Only when you thicken the sound-absorbing material to a certain extent, can it absorb the low frequency above 130Hz. We only understand the specific circumstances of noise generation, and according to the actual environment, we can choose the appropriate sound-absorbing panel or sound-insulating panel to decorate the environment to achieve the better expected purpose and better effect.
