Views: 0 Author: Site Editor Publish Time: 2025-04-07 Origin: Site
Side channel blowers have efficient airflow, compact design, and maintenance-free features. However, but noise emission is a relevant consideration, especially in indoor applications or noise-sensitive environments.
Noise level of a side channel blower varies significantly depending on the model and operating conditions. Generally, the sound pressure level ranges between 53 dB(A) to 84 dB(A).
The quietest model, DHB 210A D40, operates at approximately 53 dB(A). This is considered very quiet, equivalent to a typical conversation in an office setting.
The loudest model, DHB 943C 025, can reach up to 84 dB(A), which is similar to the noise level of city traffic or a power lawn mower.
Even though these figures fall within acceptable industrial noise limits, there is still a necessity to manage them, particularly in environments focused on worker health, environmental standards, or acoustic comfort.
Installing an isolation cover—also known as an acoustic enclosure—is one of the most effective ways to reduce blower noise. These covers are constructed from sound-absorbing materials and are designed to enclose the blower without interfering with its ventilation or cooling.
Advantages:
Noise reduction of up to 10–15 dB(A) depending on the enclosure design
Customizable to different blower sizes and configurations
Allows for maintenance access while maintaining acoustic insulation
Mufflers, or inline silencers, can be installed on the inlet and outlet ports of the side channel blower. They are particularly useful for mitigating airborne noise caused by high-velocity airflow.
Benefits:
Reduces high-frequency noise
Easy to retrofit onto existing systems
Often compact and do not require significant additional space
Technical Tips:
Choose absorption-type mufflers for broadband noise attenuation
Match the muffler’s diameter and airflow capacity to the blower specifications
Use dual mufflers (on both suction and discharge) for optimal noise suppression
Mechanical vibrations are a primary contributor to structure-borne noise, especially when blowers are installed on rigid surfaces like steel or concrete. Implementing resonance isolation addresses this by decoupling the blower from its mounting base.
Methods:
Adding resilient pads between the blower and mounting surface
Mounting blowers on floating platforms designed to absorb mechanical energy
Outcome:
Significant reduction in low-frequency hums
Prevention of noise propagation through piping and ductwork
Increased equipment life by reducing mechanical stress
A factory running DHB 943C 025 blowers experienced ambient noise levels of 82 dB(A). After retrofitting the system with:
Custom-built acoustic enclosures
Dual-port mufflers
Anti-vibration mounts
The new measured noise level dropped to 68 dB(A)—a 14 dB(A) reduction, dramatically improving worker comfort and environmental compliance.
Although side channel blowers are already quieter than many other industrial blowers, noise control remains essential for modern facilities focused on health, efficiency, and compliance. Through proper acoustic design, including the use of isolation covers, mufflers, and resonance isolation, businesses can ensure a cleaner, quieter workspace without sacrificing performance.
Noise-reducing accessories are not optional—they are essential tools for maintaining a productive and safe environment, especially when operating blowers in noise-sensitive zones. Investing in these solutions ensures not only employee well-being, but also the long-term success of industrial operations where acoustic control is part of operational excellence.
