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Mar 09

Noise Reduction Ideas For Your Standby Power Generator

By: Patti Dinneen


Diesel power generators provide insurance and assurance that you will remain operational in an emergency; however, when there isn’t an emergency, you typically won’t want to know that it’s there. Generator sets will usually need to be tested on a regular schedule to insure operation in case of an emergency. Due to the testing schedules of the generators, noise control is an issue that needs to be addressed adequately so as not to disrupt normal business routines to test an emergency or back-up system.

This blog outlines how generator noise is created, and discusses the sound attenuation technology being adopted to reduce generator noise emissions.

Which Parts of A CT Industrial Generator Make Noise?

To better understand how to silence your generator, first, you must understand what proponents create the noise. Noise sources from diesel, and gaseous-fueled generator sets are numerous, but can generally be defined as:

Mechanical: Rotating/moving parts transmitting vibration acoustically to the surrounding ambient. (Acoustic vibration to the surrounding atmosphere can be reduced by employing sound-absorbent materials, mechanical isolation of vibration, redirecting air-flow before it exits the equipment to dissipate sound, and designing enclosures that are well sealed and acoustically lagged).

Exhaust: Internal combustion noises from the engine transmitted through the exhaust and engine carcass. (A by-product of cleaner burning, more efficient engines, has been smoother running and quieter engines. Exhaust muffler grade will have a significant effect on overall exhaust noise.)

Air flow: Air is required for combustion and cooling and noise is produced by cooling fan tips and combustion inlet draw. (More attention to aerodynamic flow can reduce noise from fans and aspiration).

How Can I Reduce Standby Power Generator Noise?

Absorption: This method primarily uses sound deadening material to lag the inside of enclosures and ductings that handle airflow inlet and outlet. If sound is not absorbed or transmitted when it strikes a surface, it will be reflected. There have been many advances in sound-absorbent material used in attenuated sets in recent years.

Redirection/Reflection: Sound that cannot be absorbed should be repeatedly reflected for good diffusion. Generator sets rely on airflow for cooling and combustion. If the airflow that also carries the noise can be deflected frequently before it exits the enclosure, the level of noise energy will be reduced by good diffusion.

Noise Cancellation Technology: This technology works on the principal that one sound wave will be cancelled out by a similar sound wave from the opposite direction. Advances in electronics have enabled use of this technology. Types of noise cancellation have been used in the deadening of noise in small commercial aircraft.

Maximize The Distance From The Source: Noise zoning ordinances typically set noise limits based on what can be measured at the property line. Since sound diminishes as the square of the distance from the source, simply increasing the distance from the property line may be enough to meet local regulations.

Kinsley Power Systems

Call us to discuss your individual needs or just ask questions about what options are available to handle noise control for diesel engine generators.

Our goal is to ensure that your system performs when you need it. Kinsley Power offers customized preventive maintenance programs and extended warranties for all customers - hospitals and cable companies and factories and homeowners alike. Kinsley services all major make and model generators, transfer switches, switchgear and PTOs. Kinsley also offers such specialized services as load bank and infrared testing.

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