In the field of building decoration industry, metal sound insulation board is one of the most commonly used sound insulation materials. It is generally made of aluminum plate with sound-absorbing mineral wool behind punching, or aluminum honeycomb board composed of front and back panel and metal honeycomb core. They all have certain noise reduction performance. Which noise reduction performance is better? In order to compare their noise reduction and noise performance, it is necessary to discuss their structures.
Punched plates are also known as "perforated aluminum veneers.". It is made of a single layer of aluminum. CNC punch design and manufacture of their own characteristics of punching. When it comes to noise reduction and noise reduction, due to the existence of holes, the propagation path of sound waves in the air is disturbed, and part of the sound waves are emitted, which has the effect of reducing noise.
Different from the stamping aluminum veneer, the structure of aluminum honeycomb panel is relatively complex, which is mainly composed of panel and bottom plate, with high-quality aluminum honeycomb core pasted in the middle. Aluminum honeycomb core is usually in the form of hexagonal honeycomb structure to form a number of closed small spaces, so as to prevent air flow and block acoustic waves. The noise reduction can reach 20-30 dB at 100-3200 Hz. Very prominent.
Through the actual test, punching aluminum plate + sound-absorbing cotton and aluminum honeycomb panel have certain noise reduction and noise reduction performance, but aluminum honeycomb panel has superior noise reduction and noise reduction performance. However, they can be improved in terms of noise reduction and sound insulation. For example, the perforated aluminum plate can be equipped with sound-absorbing rock wool in the interior, or the aluminum honeycomb panel can be pressed, all of which can improve its noise reduction performance. Great improvement.