Sound absorption performance
 
The first requirement for the flooring material of the anechoic chamber is sound absorption performance. The ground needs to be able to effectively absorb sound and reduce sound reflection. This is usually achieved through the use of sound-absorbing materials, such as glass wool or other porous sound-absorbing materials. The sound absorption coefficient of the ground needs to be greater than 0.99 to ensure that the indoor acoustic performance meets the requirements.
 
Stiffness and stability
 
The ground material also needs to have sufficient rigidity and stability to support the weight of equipment and personnel, while maintaining good acoustic performance. The ground should not vibrate due to personnel movement or equipment placement, which may affect the test results. Therefore, the selection and construction of ground materials need to consider measures for vibration isolation and reduction.
 
Flatness and wear resistance
 
Another requirement for the floor of the anechoic chamber is flatness. The ground needs to be flat to ensure consistency of sound waves during indoor propagation. In addition, the ground material also needs to have good wear resistance for long-term use and maintenance.
 
Reflection coefficient
 
In some cases, there are specific requirements for the reflection coefficient of the anechoic chamber floor. For example, the floor of a semi anechoic chamber needs to have a certain reflection coefficient to ensure that the sound waves between the sound source and receiver only have direct sound and no reflected sound.
 
Conclusion
 
In summary, the specific requirements for the flooring material of the anechoic chamber include:
 
-Sound absorption performance: The sound absorption coefficient is greater than 0.99 to reduce sound reflection.
-Stiffness and stability: sufficient rigidity and stability to support the weight of equipment and personnel while maintaining good acoustic performance.
-Flatness and wear resistance: The ground is flat and has wear resistance for long-term use and maintenance.
-Reflection coefficient: In specific situations, the reflection coefficient of the ground needs to meet design requirements to ensure the accuracy of the sound field.
 
These requirements ensure that the anechoic chamber can provide an ideal acoustic environment to meet the needs of various acoustic testing and research.