Ann Arbor Noise Control - Lessening Hvac Noise Problems

By Author: O'Neill Engineered Systems, Inc
Total Articles: 254
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Imagine a situation of two cabins, both supplied with air by a centrifugal fan in the nearby room. I am going to utilize this situation to describe each of the sound problems and their solutions.

We will undergo every noise type systematically. First of all, we will discuss the issue and then the solution. Systematically, we manage every noise type.

Mechanical noise

The centrifugal fan is pumping air into the rooms A and B. Though the fan is positioned within a separate room, mechanical noise can be hard through the bulkheads, specifically in room A, as this room is next to the fan room. The source of the noise is the fan itself, and to lessen the noise, we should insulate the fan. Another choice is to insulate the whole room.

The mechanical fan noise is isolated by the sound waves and box won’t penetrate the bulkhead. Nonetheless, as the rooms are connected to an air duct, sound waves travelling through the air supply can still enter the room. To lessen the noise, we can put a sound muffle in the duct. The longer the muffle the better, specifically with mechanical noise, as the frequency ...
... is low and the wave lengths are long.

Airflow noise

Generally the airflow is laminar, which entails the air molecules travel through the duct in layers. Distortions in the ducting system, like bottlenecks, bends or HVAC equipment, may cause the airflow to be turbulent. The molecules of air spin around the duct, swooshing and humming, which causes airflow noise. Turbulent air can be caused nu bad duct design or high speeds within the duct.

To stop the air from becoming turbulent, the ducting system should be modified to lessen resistance. Be sure the bends are as curved as possible, guiding the air into the proper direction while avoiding collisions with the sides. You may also use blades within the bend to guide the air. Another choice is to put a sound damper before and after the bend. Dividing the muffles into various sections forces the air into layers and makes it become laminar again.

The discussed solutions are general for ventilation systems. But the same noise issues happen in other systems, such as drinking water system, where it is the circulation pump that is responsible for the mechanical and vibrational noise and water that creates turbulence in the pipes. Another instance is a cooling plant with Freon lines and a compressor, its mechanical parts flow and vibrations.

This concludes our post on Ann Arbor Noise Control, written to highlight the essence of acoustic convenience in an HVAC system and provide a better understanding of the sound nature. We have witnessed that conditions such as relative humidity and temperature are not the only parameters for a convenient environment. By knowing the various noise types, you can get a solution for every HVAC noise issue.

O’Neill Engineered Systems is your most reliable choice for Ann Arbor Noise Control, Iowa noise control, Cedar Rapids noise control, and Davenport noise control. Contact us today!