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KOHLER-SDMO Diesel Generators

Reducing generator noise

All generators will produce mechanical vibrations and unwanted sound during operation. The noise produced is not only a nuisance, but sound levels above 85 decibels over periods longer than eight hours can also be detrimental to health; with the potential to cause permanent hearing damage.

Five methods to reduce generator noise and vibrations:

Reposition the generator

It may seem too simple a solution; but sound level reduces by 6 decibels (dB) for every doubling of distance you move away from a sound source. When moving the generator further away from the building, make sure that you are not causing increased disturbance to your neighbours. You will also need to consider any potential cabling issues.

In-skid anti-vibration mounts (AVM)

Using vibration absorbing pads underneath the generator can reduce vibration by up to 95%. Rubber isolators use an elastomer to dissipate mechanical energy and are particularly useful as shock isolators because of their high energy storage capacity.

Mount your generator on an isolated concrete pad

By installing a generator on top of its own, isolated concrete pad you minimize the mechanical energy transfer to the surrounding buildings and structures.

Acoustic enclosures and canopies

Whether you opt for an open, canopied or containerised generator will depend on many factors including the environment in which it used and also whether sound reduction is required. Standard manufacturer built canopies can reduce sound levels by at least 10 decibels, with custom built options offering even greater reductions in noise.

Sound attenuating enclosures

Purpose built sound attenuation housings mute much of the noise a generator makes without restricting the necessary air intake. The enclosures contain panels of composite materials, with an impervious layer on the outside and a layer of porous sound absorbing material facing towards the interior of the genset. The outer layer blocks the sound waves from leaving the set, reflecting them back into the porous layer where the sound waves are then dissipated.