What is the principle of noise board?
The vibration produces sound and the sound propagates through the medium. Any object can spread the sound, so any object can be called medium. Experiments show that: sound through the density of large media, the sound energy loss is large, so the greater the density of objects, the better the volume.
A kind of transmission of sound is called intermediation. That is, from one medium through the critical contact surface of the two media into another medium, at this time, the transmission of acoustic energy is the transmission of vibration amplitude. Cross-media propagation, the greater the difference between the density of the two media, the greater the loss of sound energy. In practice, the air is the human normal space, so the greater the density of the material with the density of the material is generally a very high density material (much lower than the air density of the material in addition to vacuum, really not much), that is, Can be regarded as sound insulation material. The higher the density, the better the sound insulation. Such materials made of sheet metal, known as sound insulation board. Sound insulation method is to use a soundproof material to isolate the sound source from the surrounding environment, so that the radiation noise can not be directly transmitted to the surrounding area, so as to achieve the purpose of noise control. The essence of sound insulation is to minimize the sound from the sound source radiation, commonly used measures are sound insulation and sound insulation structure.
Sound insulation method is to use a soundproof material to isolate the sound source from the surrounding environment, so that the radiation noise can not be directly transmitted to the surrounding area, so as to achieve the purpose of noise control.
Another transmission of sound is the spread of the media. That is, from a medium, through the two media critical contact surface into another medium, this time, the transmission of acoustic energy is the transmission of vibration amplitude. Cross-media propagation, the greater the difference between the density of the two media, the greater the loss of sound energy. In practice, the air is the human normal space, so the greater the density of the material with the density of the material is generally a very high density material (much lower than the air density of the material in addition to vacuum, really not much), that is, Can be regarded as sound insulation material. The higher the density, the better the sound insulation. Such materials made of sheet metal, known as sound insulation board
