Why can anechoic room eliminate sound?

The anechoic chamber is mainly composed of a series of sound insulation and absorption materials. The anechoic effect required by anechoic room is achieved by designing ground vibration isolation, wall sound insulation and sound absorption, ceiling sound insulation, sound insulation doors and windows, etc.

The acoustic effect of anechoic chamber includes environmental noise and background noise in anechoic chamber. The greater the difference between inside and outside, the higher the requirement for noise elimination design. In order to achieve the ideal effect in the anechoic room, the scheme design must be carried out from three aspects: vibration isolation, sound insulation and sound absorption.

1. First of all, the whole vibration isolation, the footsteps on the ground, the vibration of machine operation, piling, etc. Will be introduced into the room through the ground. In order to prevent these sounds from entering the anechoic room, it is necessary to "suspend" the ground and install damping dampers under the floor.

2. In addition to vibration isolation, the thickness of the wall should be designed according to the difference of internal and external noise. Sound absorption, sound insulation and other methods consistent with the wall should be adopted, and the ceiling and the wall should be manufactured in the same way.

3. In order to achieve better sound absorption effect, materials such as sound insulation cotton and sound absorption wedge will be installed in the sound absorption room to achieve ideal sound absorption effect.

The above is a brief introduction to how to eliminate noise in anechoic room. The core is to achieve the noise elimination effect through a series of sound absorption and noise reduction materials.