The application of sound absorbing materials in sound insulation engineering

In the design of the soundproofing project, the surface of the sound absorbing material often appears in the material list, and some people ask why the sound absorbing material is used for the soundproofing project.

Bars, KTVs, machine rooms, workshops, etc. will release a lot of noise to the outside world. The use of soundproof materials can suppress the noise from spreading out, but the internal noise can not be controlled. It is unbearable for people working indoors, using sound absorbing materials. Part of the sound energy can be converted into heat energy consumption to play the role of internal noise reduction to adjust the reverberation. For the sound insulation effect, the sound absorbing material can reduce the amount of noise that will be propagated inside, thereby achieving better. Sound insulation.

Sound-absorbing materials are often used in combination with sound-insulating materials in sound-proofing projects. For example, soundproofing felts and sound-insulating cotton are good for making sound-insulating walls and sound-insulating ceilings. I want to complete the soundproofing works in order to meet acoustic requirements in opera houses, recording studios, cinemas, etc. Later, a layer of polyester fiber sound absorbing panels is fixed on the surface to adjust the reverberation and the exterior decoration.

The sound absorbing materials commonly used in sound insulation engineering are glass fiber sound absorbing cotton. The advantage is fireproof and economical. The polyester fiber sound absorbing cotton/board has the advantages of high environmental protection index and can be used as exterior decoration. In fact, the effect of each sound absorbing material is Very good, choose according to the construction needs.

Nanchang Jialu environmental protection soundproof glass wool (sound insulation glass wool board, sound insulation cotton centrifugal glass wool, wall sound insulation cotton) internal fiber fluffy interlaced, there are a lot of tiny pores, is a typical porous sound-absorbing sound insulation material, with good sound absorption characteristic. Centrifugal glass wool can be made into wallboard, ceiling, space sound absorber, etc. It can absorb the sound energy in the room in a large amount, reduce the reverberation time and reduce the indoor noise.

The reason for sound absorption is because there are a large number of tiny pores and pores that are connected inside and outside. When sound waves are incident on the centrifugal glass wool, sound waves can enter the inside of the material along the pores, causing vibration of air molecules in the gap. Due to the viscous resistance of the air and the friction between the air molecules and the pore walls, the acoustic energy is converted into heat energy and lost.