Types of Noise Attenuators for Generators
There are two main types of noise attenuators used to silence diesel generators. They can either be cylindrical or rectangular. Cylindrical attenuators are fitted in the ducts to silence noise from the inside. The rectangular attenuators are fitted over the generator, both of the attenuators use the same principle in noise reduction.
Rectangular attenuators have dissipative silencers that deliver acoustic energy in contact with the sound absorbing media inside it. The round attenuator comes with a head that spins and a cone shaped tail. The circular attenuator is also double walled.
Inside the interior wall is the sound absorbing insulation that helps keep the sound produced to the minimum. The attenuators reduce the noise but also maintain the pressure changes in the generator system so air flows through the system with ease.
How Does a Noise Attenuator Work?
Noise attenuators are used as a wholesome part of a system rather than in isolation for the best performance. They are used when the system is being installed for the best effect instead of adding them later.
Noise attenuators have sound absorbing insulation inside to keep the sound down. Acoustic insulation inside the noise attenuator contains millions of air pockets that absorb the acoustic energy as it passes, reducing the noise.
The insulation inside the attenuators vary in thickness depending on the frequency of the sound produced. Increasing the length of the attenuator enhances sound attenuation, affecting the pressure in the generator system.
Regular maintenance of the attenuator is carried out to reduce noise. Maintenance ensures there is no loose fittings in the maintenance system that could significantly increase the noise, or performance of the system.
Looking for information about diesel generators? Contact us to find out more about diesel generator systems and how they work.