TOP 7 most effective axial fan noise reduction solutions

June 15, 2022

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Axial fans have many applications for industrial zones. Usually large in size and pressure. During use, they may make a loud noise. Noise interferes with other activities. Methods to reduce axial fan noise is required. Find out below.

The noise level determines the quality of the fan

Axial fans are widely used for ventilation, cooling, exhaust extraction, and various other purposes. You can easily find axial fans in many places such as shopping centers, high-rise buildings, factories, parking garages, and so on. Sometimes you may hear noises, and they can be discomforting.

Low-frequency, low-intensity noises can cause headaches, discomfort, and fatigue in humans.
Noises exceeding the permissible level can immediately lead to discomfort, ringing in the ears, and in some cases, partial deafness.

Therefore, when installing industrial fans in general or axial fans in particular, it is essential to ensure low noise levels within permissible limits.

The noise level of an axial fan can be partly indicative of the fan’s quality. For example, if an axial fan has an efficiency of around 60%, the remaining 40% is loss. This loss generates heat, and a portion of it results in noise. Therefore, less efficient fans tend to produce louder noises.

TOP 7 most effective axial fan noise reduction solutions

Allowable noise level of axial fan

Industrial machinery equipment in general often generates loud noises when operating. According to the recommendations, equipment when manufacturing should ensure the permissible noise level according to regulations. The recommended noise level by area is as follows:

– Buildings and offices: 40 – 65(dB)

– Hospital: 40 – 55(dB)

– School: 35 – 55(dB)

– Recording room, cinema: 20-30(dB)

– Hostels and hotels: 30 – 55(dB)

– Shopping mall: 45 -55(dB)

– Administrative offices and libraries: 35 – 45(dB)

– Drama theater, auditorium: 25 – 40(dB)

– Mixed sports building: 40 – 55(dB)

With axial fans, when using it, it is also necessary to limit the noise to an acceptable level. Make sure not to affect the environment and people.

🔰 USEFUL INFORMATION

📣 What are axial fans used for? How axial fans work

📣 What types of exhaust fans are there?

Ways to reduce noise axial fans

With axial fans of large size and power, it is common to make a louder noise when operating. There are many cases in, which installing axial fans makes the noise louder than allowed. Noise can affect the activities of people around. So how to reduce noise urination for axial fans? Here are some suggestions for you..

1. Tailored axial propeller head design

The design of the axial fan partially affects the noise level of the fan. To reduce noise for axial fans, fan manufacturers can research a reasonable blade design. Partial reduction of the blade head does not affect the quality of the fan, but can effectively reduce noise.

Details as shown below:

2. Installing duct sound absorption

The fan inlet or outlet is usually fitted with ducts to draw or blow air. Sound-absorbing ducts are selected to effectively reduce noise.

3. Install fan silencer

Install the silencer in any location that generates noise.

4. Radiation noise treatment

Radiant noise occurs as a result of sound passing around the fan housing and to the outside. To limit radiated noise, the manufacturer can increase the thickness of the fan housing. As a result, the fan works effectively to reduce noise.

5. Install the fan in a location far from crowded places

Choosing the right fan installation location helps the fan achieve efficient operation as well as minimize noise. Avoid installing fans in high-traffic locations. If installed for factories, it is possible to arrange the working position of workers away from the fan position. This helps ensure the efficiency of the fan’s ventilation and cooling while still limiting noise..

6. Choosing the right fan

Select axial fans with suitable specifications. Avoid selecting a fan with a capacity that exceeds the users’ needs.. This not only does not use the full capacity of the fan, costs investment costs, and causes loud noise.

7. Using the transmission system

Use sound-absorbing materials to absorb noise, helping to diffuse noise. As a result, the space effectively limits noise.

8. Periodic maintenance

It is recommended to periodically maintain the fan to ensure that the fan does not have technical problems or malfunctions. Thereby helping the fan to operate stably, quietly, and reduce noise.

After using the axial fan for a while, if you find the fan makes too much noise. Should disconnect the fan operation and check. Maybe the fan has some problem. For example: the propeller is unbalanced, and the fan shaft has a problem… When checking, the technician will check and fix it in time.

Above is some information on how to control the noise of axial fans. Hope the above information is useful for readers.

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