The laying density of sound-absorbing materials directly affects the sound absorption performance of the anechoic chamber, so it is crucial to choose an appropriate density range. The following is a detailed analysis of the optimal range of density for laying sound-absorbing materials:
 
1. The relationship between sound absorption performance and density
 
The density of sound-absorbing materials has a significant impact on their sound absorption performance. Generally speaking, the higher the density of a material, the tighter its internal structure and the lower its porosity, which makes it difficult for sound waves to enter the interior of the material and thus reduces the sound absorption effect. On the contrary, materials with lower density usually have larger porosity, which is conducive to the penetration and absorption of sound waves, thereby improving sound absorption performance.
 
2. Optimal density range
 
Although lower density sound-absorbing materials usually have better sound absorption performance, too low density may lead to a decrease in the structural stability of the material, affecting its durability and reliability in practical applications. Therefore, when choosing the density of sound-absorbing materials, it is necessary to find a balance point that can ensure sufficient sound-absorbing performance while maintaining the structural stability of the material.
 
3. Density selection in practical applications
 
In practical applications, the density of sound-absorbing materials is usually considered to be within the ideal range of 0.2 g/cm ³ to 0.5 g/cm ³. Within this range, the material can provide good sound absorption effect without causing structural instability due to low density. However, this range is not absolute, and the specific optimal density needs to be determined based on the type of sound-absorbing material selected, the target frequency range, and other specific acoustic requirements.
 
4. Conclusion
 
In summary, the optimal range of laying density for sound-absorbing materials needs to be determined based on the specific type of sound-absorbing material and the target frequency range. Generally speaking, sound-absorbing materials with a density between 0.2 g/cm ³ and 0.5 g/cm ³ can maintain good structural stability while ensuring sound absorption performance. In practical applications, the appropriate density range should be selected according to the specific situation to ensure that the anechoic chamber can achieve the expected acoustic effect.