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Metal sound insulation board belongs to a kind of sound insulation board, which is a general designation of objects with certain sound insulation effect. In theory, general objects have sound insulation effect, but we call a sound insulation board when the average sound insulation amount (in an infinite space, an infinite material is placed between the sound source and the measured point) exceeds 30dB. The sound insulation board is generally high-density material.

How does the metal sound insulation board play the sound insulation effect? When it comes to the sound insulation, we have to start from the sound transmission. Sound is a kind of wave energy, which needs medium to transmit. When sound propagates in the same medium, the higher the medium density, the faster the propagation speed. For example, the propagation speed in normal temperature air is about 340 m / s, and in rail is about 5200 M / s. Another way of sound transmission is through media. That is to say, from one medium, through the critical contact surface of two mediums to another medium, at this time, the transmission of sound energy is essentially the transmission of vibration amplitude. The greater the density difference between the two media, the greater the loss of sound energy. In practical application, air is the normal activity space of human beings, so the material with greater difference from air density is generally the material with high density (the material with much lower density than air is not much except vacuum), which can be regarded as sound insulation material. The higher the density, the better the sound insulation effect. The board made of such materials is called sound insulation board.

I believe that you have a certain understanding of metal acoustic panels. Metal sound insulation board can not block all frequencies of sound, objects have natural resonance frequency, close to the resonance frequency of objects, the sound insulation effect of sound insulation board is significantly reduced. The metal sound insulation board has the difference between air sound insulation and vibration sound insulation. Air sound insulation board, that is, the board that blocks the sound transmitted in the air. The vibration sound insulation board is the board and system that block the sound transmitted in the rigid components (such as reinforced concrete integrated house).

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