Acoustic enclosures, soundproof booths, and quiet rooms are noise control measures that involve enclosing the noise source (equipment producing noise) within a smaller space using soundproof components, minimizing the transmission of noise. The shape of the acoustic enclosures is often designed to be close to the periphery of the sound source and as close as possible to the source.
Assemble to reduce volume and lower cost.
Acoustic隔音hoods, soundproof rooms, and silent rooms have wide applications. They are used in various noise-generating equipment such as fans, pumps, and many other noise control applications. The primary design principle is to effectively treat noise sources by intercepting the propagation path of sound waves. Due to the varying external dimensions, ventilation, and heat dissipation requirements of each sound source equipment, they often need to be custom-designed and manufactured based on the specific on-site noise source conditions.
To ensure adequate sound insulation, soundproof enclosures, soundproof rooms, and quiet rooms typically use metal materials such as galvanized steel plates or aluminum sheets, ranging from 0.5 to 2 meters in thickness. Sometimes, a damping coating material of 3 to 5 millimeters is also required on the interior walls to reduce resonance or standing wave phenomena in the metal exterior walls. The inner layer of the soundproof enclosures often features perforated plates covered with absorbent materials or directly adheres polyurethane-based sound-absorbing materials.
The principle of operation for the sound-insulating enclosure is to confine the noise source within a small space, thereby reducing its outward radiation of noise. Consequently, the overall structure of the sound-insulating enclosure must be designed according to the structure of the sound source equipment, and does not have a particularly fixed shape.
Or structure.
Generally, a lightweight and sound-insulating composite structure is required for design, and the sound-insulating enclosure must also be equipped with an acoustic lining with high absorption coefficients. Depending on the working characteristics of some special equipment, measures such as vibration isolators, double-sealed structures, structures with ventilation openings, and ventilation pipes with added acoustic materials may also be employed.
Design Key Points
Soundproof enclosures offer excellent noise reduction and are widely used in noise control engineering. When designing and selecting soundproof enclosures, attention should be given to the following aspects:
1. The shell must have sufficient sound insulation, and for ease of manufacturing, installation, and maintenance, it is advisable to use thin, dense materials such as 0.5-2mm thick steel or aluminum plates.
2. When using thin materials such as steel or aluminum sheets for the casing, reinforcing the wall surface and applying a damping layer is necessary to suppress and reduce the effects of resonance and sympathetic vibration.
3. There must be no rigid contact between the housing, the sound source equipment, and its mount to avoid creating an "acoustic bridge" that would reduce the sound insulation level. Additionally, the sound-insulating housing should form vibration isolation with the ground to decrease solid sound.
4. When installing soundproof windows and doors, ventilation, and cable pipelines, the gaps must be sealed, and vibration reduction and sealing measures should be in place around the pipelines.
5. The interior should be treated with sound absorption, and when using porous loose materials, a sturdy protective layer should be applied.
6. The housing form should be appropriate, with minimal use of square parallel walls to prevent standing wave effects within the housing. Additionally, there should be ample space between the inner wall and the equipment, typically more than 1/3 of the equipment's space. The distance between each inner wall surface and the equipment must not be less than 10cm to avoid coupling resonance and reduce sound insulation.
7. When the machines and equipment covered by the cover require ventilation and cooling due to temperature rise, noise reduction measures such as mufflers should be added, ensuring that the mufflers match the insertion loss of the sound-insulating cover. Industrial noise reduction equipment and comprehensive noise treatment system structures: fixed and removable types, select based on noise reduction requirements, site conditions, and price.
Specific Applications: Soundproof enclosures are used for various equipment such as fans, air compressors, motors, electric saws, air conditioners, etc., to reduce noise. They feature compact structure, easy assembly, and excellent noise reduction performance.
